Fixes for #466

 - Created a grunt task to build, compress, and upload the build to s3
 - Updated the README to point users to downloads.elasticsearch.org

Fixed dashboard scripts

Fixed the loading of the dashboard scripts, feeding them the needed args and fixing the path that they are fetch from.

Spencers cache busting tweaks, fix for map panel path

Conflicts:
	dist/app/components/require.config.js
	src/app/components/require.config.js

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.

Added a cache busting config option to RequireJS that will add the latest commit sha to urls (only in dist build).

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