docs(example): move datasource example to seperate repo

examples/README.md

+## Example plugin implementations
+
+[datasource-plugin-genericdatsource](https://github.com/grafana/datasource-plugin-genericdatasource/tree/3.0)
\ No newline at end of file

examples/datasource-plugin-genericdatasource/.jscs.json

-{
-    "disallowImplicitTypeConversion": ["string"],
-    "disallowKeywords": ["with"],
-    "disallowMultipleLineBreaks": true,
-    "disallowMixedSpacesAndTabs": true,
-    "disallowTrailingWhitespace": true,
-    "requireSpacesInFunctionExpression": {
-        "beforeOpeningCurlyBrace": true
-    },
-    "disallowSpacesInsideArrayBrackets": true,
-    "disallowSpacesInsideParentheses": true,
-    "validateIndentation": 2
-}
\ No newline at end of file

examples/datasource-plugin-genericdatasource/.jshintrc

-{
-  "browser": true,
-  "esnext": true,
-
-  "bitwise":false,
-  "curly": true,
-  "eqnull": true,
-  "devel": true,
-  "eqeqeq": true,
-  "forin": false,
-  "immed": true,
-  "supernew": true,
-  "expr": true,
-  "indent": 2,
-  "latedef": true,
-  "newcap": true,
-  "noarg": true,
-  "noempty": true,
-  "undef": true,
-  "boss": true,
-  "trailing": true,
-  "laxbreak": true,
-  "laxcomma": true,
-  "sub": true,
-  "unused": true,
-  "maxdepth": 6,
-  "maxlen": 140,
-
-  "globals": {
-    "System": true,
-    "define": true,
-    "require": true,
-    "Chromath": false,
-    "setImmediate": true
-  }
-}

examples/datasource-plugin-genericdatasource/Gruntfile.js

-module.exports = function(grunt) {
-
-  require('load-grunt-tasks')(grunt);
-
-  grunt.loadNpmTasks('grunt-execute');
-  grunt.loadNpmTasks('grunt-contrib-clean');
-
-  grunt.initConfig({
-
-    clean: ["dist"],
-
-    copy: {
-      src_to_dist: {
-        cwd: 'src',
-        expand: true,
-        src: ['**/*', '!**/*.js', '!**/*.scss'],
-        dest: 'dist'
-      },
-      pluginDef: {
-        expand: true,
-        src: 'plugin.json',
-        dest: 'dist',
-      }
-    },
-
-    watch: {
-      rebuild_all: {
-        files: ['src/**/*', 'plugin.json'],
-        tasks: ['default'],
-        options: {spawn: false}
-      },
-    },
-
-    babel: {
-      options: {
-        sourceMap: true,
-        presets:  ["es2015"],
-        plugins: ['transform-es2015-modules-systemjs', "transform-es2015-for-of"],
-      },
-      dist: {
-        files: [{
-          cwd: 'src',
-          expand: true,
-          src: ['**/*.js'],
-          dest: 'dist',
-          ext:'.js'
-        }]
-      },
-    },
-
-  });
-
-  grunt.registerTask('default', ['clean', 'copy:src_to_dist', 'copy:pluginDef', 'babel']);
-};

examples/datasource-plugin-genericdatasource/README.md

-#Generic backend datasource#
-
-More documentation about datasource plugins can be found in the [Docs](https://github.com/grafana/grafana/blob/master/docs/sources/plugins/datasources.md)
-
-Your backend need implement 4 urls
- * "/" Should return 200 ok. Used for "Test connection" on the datasource config page.
- * "/search" Used by the find metric options on the query tab in panels
- * "/query" Should return metrics based on input
- * "/annotations" should return annotations
-
-## Example backend implementation ##
-https://gist.github.com/bergquist/bc4aa5baface3cffa109
\ No newline at end of file

examples/datasource-plugin-genericdatasource/package.json

-{
-  "name": "kentik-app",
-  "private": true,
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/raintank/kentik-app-poc.git"
-  },
-  "author": "",
-  "license": "ISC",
-  "bugs": {
-    "url": "https://github.com/raintank/kentik-app-poc/issues"
-  },
-  "devDependencies": {
-    "grunt": "~0.4.5",
-    "babel": "~6.5.1",
-    "grunt-babel": "~6.0.0",
-    "grunt-contrib-copy": "~0.8.2",
-    "grunt-contrib-watch": "^0.6.1",
-    "grunt-contrib-uglify": "~0.11.0",
-    "grunt-systemjs-builder": "^0.2.5",
-    "load-grunt-tasks": "~3.2.0",
-    "grunt-execute": "~0.2.2",
-    "grunt-contrib-clean": "~0.6.0"
-  },
-  "dependencies": {
-    "babel-plugin-transform-es2015-modules-systemjs": "^6.5.0",
-    "babel-preset-es2015": "^6.5.0",
-    "lodash": "~4.0.0"
-  },
-  "homepage": "https://github.com/raintank/kentik-app-poc#readme"
-}

examples/datasource-plugin-genericdatasource/plugin.json

-{
-  "name": "GenericDatasource",
-  "id": "datasource-plugin-genericdatasource",
-  "type": "datasource",
-
-  "staticRoot": ".",
-
-  "metrics": true,
-  "annotations": true,
-
-  "info": {
-    "description": "generic datsource plugin",
-    "author": {
-      "name": "Raintank Inc.",
-      "url": "http://raintank.io"
-    },
-    "version": "0.9.0",
-    "updated": "2016-02-10"
-  },
-
-  "dependencies": {
-    "grafanaVersion": "2.6.x",
-    "plugins": [ ]
-  }
-}

examples/datasource-plugin-genericdatasource/src/css/query-editor.css

-.generic-datasource-query-row .query-keyword {
-  width: 75px;
-}
\ No newline at end of file

examples/datasource-plugin-genericdatasource/src/datasource.js

-export class GenericDatasource {
-
-  constructor(instanceSettings, $q, backendSrv) {
-    this.type = instanceSettings.type;
-    this.url = instanceSettings.url;
-    this.name = instanceSettings.name;
-    this.q = $q;
-    this.backendSrv = backendSrv;
-  }
-
-  // Called once per panel (graph)
-  query(options) {
-    var query = this.buildQueryParameters(options);
-
-    if (query.targets.length <= 0) {
-      return this.q.when([]);
-    }
-
-    return this.backendSrv.datasourceRequest({
-      url: this.url + '/query',
-      data: query,
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' }
-    });
-  }
-
-  // Required
-  // Used for testing datasource in datasource configuration pange
-  testDatasource() {
-    return this.backendSrv.datasourceRequest({
-      url: this.url + '/',
-      method: 'GET'
-    }).then(response => {
-      if (response.status === 200) {
-        return { status: "success", message: "Data source is working", title: "Success" };
-      }
-    });
-  }
-
-  annotationQuery(options) {
-    return this.backendSrv.datasourceRequest({
-      url: this.url + '/annotations',
-      method: 'POST',
-      data: options
-    }).then(result => {
-      return result.data;
-    });
-  }
-
-  // Optional
-  // Required for templating
-  metricFindQuery(options) {
-    return this.backendSrv.datasourceRequest({
-      url: this.url + '/search',
-      data: options,
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' }
-    }).then(this.mapToTextValue);
-  }
-
-  mapToTextValue(result) {
-    return _.map(result.data, (d, i) => {
-      return { text: d, value: i};
-    });
-  }
-
-  buildQueryParameters(options) {
-    //remove placeholder targets
-    options.targets = _.filter(options.targets, target => {
-      return target.target !== 'select metric';
-    });
-
-    return options;
-  }
-}

examples/datasource-plugin-genericdatasource/src/module.js

-import {GenericDatasource} from './datasource';
-import {GenericDatasourceQueryCtrl} from './query_ctrl';
-
-class GenericConfigCtrl {}
-GenericConfigCtrl.templateUrl = 'partials/config.html';
-
-class GenericQueryOptionsCtrl {}
-GenericQueryOptionsCtrl.templateUrl = 'partials/query.options.html';
-
-class GenericAnnotationsQueryCtrl {}
-GenericAnnotationsQueryCtrl.templateUrl = 'partials/annotations.editor.html'
-
-export {
-  GenericDatasource as Datasource,
-  GenericDatasourceQueryCtrl as QueryCtrl,
-  GenericConfigCtrl as ConfigCtrl,
-  GenericQueryOptionsCtrl as QueryOptionsCtrl,
-  GenericAnnotationsQueryCtrl as AnnotationsQueryCtrl
-};

examples/datasource-plugin-genericdatasource/src/partials/annotations.editor.html

-
-<h5 class="section-heading">Query</h5>
-<div class="gf-form-group">
-  <div class="gf-form">
-    <input type="text" class="gf-form-input" ng-model='ctrl.annotation.query' placeholder=""></input>
-  </div>
-</div>
-
-

examples/datasource-plugin-genericdatasource/src/partials/config.html

-<datasource-http-settings current="ctrl.current">
-</datasource-http-settings>

examples/datasource-plugin-genericdatasource/src/partials/query.editor.html

-<query-editor-row ctrl="ctrl" class="generic-datasource-query-row">
-	<ul class="tight-form-list">
-    <li class="tight-form-item query-keyword">Query</li>
-    <li>
-      <metric-segment-model property="ctrl.target.target" get-options="ctrl.getOptions()" on-change="ctrl.onChangeInternal()" css-class="tight-form-item-xxlarge"></metric-segment-model>
-    </li>
-  </ul>
-</query-editor-row>

examples/datasource-plugin-genericdatasource/src/partials/query.options.html

-<section class="grafana-metric-options" >
-  <div class="gf-form">
-  </div>
-</section>

examples/datasource-plugin-genericdatasource/src/query_ctrl.js

-import {QueryCtrl} from 'app/plugins/sdk';
-import './css/query-editor.css!'
-
-export class GenericDatasourceQueryCtrl extends QueryCtrl {
-
-  constructor($scope, $injector, uiSegmentSrv)  {
-    super($scope, $injector);
-
-    this.scope = $scope;
-    this.uiSegmentSrv = uiSegmentSrv;
-    this.target.target = this.target.target || 'select metric';
-  }
-
-  getOptions() {
-    return this.datasource.metricFindQuery(this.target)
-      .then(this.uiSegmentSrv.transformToSegments(false));
-      // Options have to be transformed by uiSegmentSrv to be usable by metric-segment-model directive
-  }
-
-  onChangeInternal() {
-    this.panelCtrl.refresh(); // Asks the panel to refresh data.
-  }
-}
-
-GenericDatasourceQueryCtrl.templateUrl = 'partials/query.editor.html';
-