* We have a reusable media browser. Supports dragging images from the library area into the slideshow (although it's not clever about where they will fall yet, they are added at the end like regular files). Search is available and the search is aware of file extensions so you can quickly locate PDFs etc.
* jQuery UI refreshed to 1.10.3.
* Moved more CSS to content.less.
* Backend /apos/browse-files action added which powers the media browser.
Merge branch 'master' of github.com:punkave/apostrophe

Conflicts:
	public/css/editor.less