Fix for jQuery extensions

Previous fix did not work when jQuery was inlined into app.js because RequireJS was under the impression that it had already init-ed jQuery and didn't call the init function. This new strategy just allows jQuery to be jQuery and has app.js include the extensions (components/extend-jquery.js) before the app boots.

Fixes the way that jQuery is loaded with RequireJS, closes #496

Somehow missed that tooltips were broken, caused by jquery defining itself using the 'jquery' name, which prevented our custom module from being included and extending jquery.

Build tweaks

 - prevented the config file from being minified.
 - offloaded the js minification to a dedicated uglify task, which accepts more options than the require-js wrapper does.
 - Addded the banner to the top of the minified files.

Fix for logstash.js, updated install instructions

Merged Pull Request #484

Removed default @message from logstash dashboards

Pointer, timepicker cleanup and show _source by default in table

Fix array value delimiting in table, improve nginx config, fix indenting

Clarify error message.

Elasticsearch will throw a 404 if there is no indexes added yet, resulting in
this unclear message -- even for people that are not using any sort of proxy.

This message update should make it easier to quickly troubleshoot why the
the dialogue is popping up.

Moved dash controller to navbar. Settings for it to dashboard settings.

Templated and scriptable dashboard options

Made logstash.js look more like logstash.json. Added info notice for lack of failover and time filter