initial backbone setup

setup a model for Word and a simple single view
got word index working with Backbone
improvements to Backbone word index...

"more words" button, performance enhancements, some basic styling.
bunch of UI stuff. testing out "favorite" feature with new architecture.
'favorite' action updates
'favorite' action working properly now
got word index and view on their way to working with backbone
some files missed in the last commit
better Backbone convention for scoped querying within a view.
refactored how the high-level layouts work. started redoing the Random Word feature to use jQuery UI dialogs instead of qTip modals.
further improve Random Word modal feature

fav'ing via its star in the modal box now actually works.
subclassed random words to existing word model

let the random word modal handle the fetching of the random word
itself; more self-contained this way.
even better UX for random word Next function.
now using Compass

mostly for Sprite generation.
update image paths, add Thin server

use SASS image-url helper for images.
refactored code, modularized files

also reformatting of css.
lots of nice refactoring, mostly in the router.

also made the header nav its own view.
new stats page. refactored and cleaned up lots of view markup.
added Responders gem. work on stats page.
tags views now working with Backbone