update twitter bootstrap css and png's to version 2.1.1
add support for RSS feed.

add link tag in page header, to support subuscribe rss/atom feed in browsers.
Merge pull request #109 from mbauhardt/jb-development

update twitter bootstrap css and png's to version 2.1.1
Merge pull request #131 from Lax/feature_rss_atom

Add support for RSS Feed
support for google universal beta tracking
fix template variable references
used underscore to be consistent with current multi word var names
Add new themes
Merge branch 'dev'

Conflicts:
	_config.yml
	assets/themes/twitter/bootstrap/css/bootstrap.min.css