Get ready for singularity!

- Use un-customized bootstrap 2.3.1
- Tweak page.tpl.php
- Add xlarge breakpoint; tweak existing breakpoints
Use new footer image (PNG)

- Remove fixed white "page" from image
- Use PNG instead of JPG for crisp details
- Compress using pngquant (outputs footer-fs8.png)
Merge branch 'dev' into singularity
Add singularitygs to Gemfile
Remove responsive/grid styles from bootstrap
Add singularitygs to config.rb
Tweak styles
Remove carets from bootstrap dropdowns
Use grid-span for #header and .thinstrip-inner
Simplify and tweak menu styles

Fixes #65
Compile scss (using :compressed output)
Use .menu-block-wrapper instead of .menu-level-1

Seems a little more clear...
Auto-detect dropdown vs. regular menus
Use custom bootstrap-sass. Simplify navbar styles.
Remove old, unused side-stripe images
Remove navbar-caret and site_name on mobile

These seem to be unnecessary, especially as a universal template
Add flexbox styles for menu (with float fallback)

- Add compass-flexbox to Gemfile, config.rb, _common.scss (@import)
- Note: Use modernizr with flexbox test to use table-cell fallback instead of float fallback
Use semi-fluid 80% width footer with min-width 960px
Remove extraneous styles

Mostly styles from UW Wordpress theme which aren't applicable (to Drupal, at least)
Fixes #54
Update README.md