bower.io v2

The bower site revamp is here. preview: [bowerio.desandro.com](http://bowerio.desandro.com).

Docs are now broken up into pages. To start us off:

+ Home page / Getting started
+ Creating packages - bower.json
+ API - command line reference
+ Configuration - about .bowerrc
+ Tools
+ About - contact, brand, logo

 This re-haul takes care of a bunch of requests that have piled up over the years

+ add Getting started #3
+ uses Jekyll #4
+ use IA / redesign #7
+ Add logo & brand colors #9
+ Add list of tools using Bower #19
+ `.bowerrc` docs #34
+ Removes "By Twitter" from masthead, moved to about page #37

It's not perfect, but it's a huge improvement over the current version (which is just a skin of the README). And, it gives us a base to build upon.

I'd like to merge this in the next week. This PR is more a head's up. Please let me know if there's anything that needs resolving before merging.