Add baseDir variable

Gruntfile.js

@@ -4,6 +4,7 @@ module.exports = function (grunt) {
 
   var config = {
     pkg: grunt.file.readJSON('package.json'),
+    baseDir: '.',
     srcDir: 'src',
     destDir: 'dist',
     tempDir: 'tmp',

tasks/options/jshint.js

@@ -7,7 +7,14 @@ module.exports = function(config) {
       }
     },
     options: {
-      jshintrc: '.jshintrc'
+      jshintrc: '<%= baseDir %>/.jshintrc',
+      ignores: [
+        'node_modules/*',
+        'dist/*',
+        'sample/*',
+        '<%= srcDir %>/vendor/*',
+        '<%= srcDir %>/app/panels/*/{lib,leaflet}/*'
+      ]
     }
   };
 };
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