Related to #114 : Favorite searches support

I added a simple support for favorite searches management (add, open, delete) to kibana-ruby-auth. It adds a dropdown menu to the search bar and uses Fancybox (http://fancybox.net) to display modal windows. The favorites (in fact the page hashcode) are stored in the defined storage backend of kibana-ruby-auth (currently only elasticsearch is supported).
I added an /api/favorites API for this purpose.

Maybe you shouldn't merge this yet. Indeed, I don't know if the window hashcodes should be considered as favorites.