Losslessly compress device-sprite.png.

Before: 255418 bytes
After:  243102 bytes
Update dependencies.
Docs: Use the minified ratchet.css.
Minify docs CSS files.

-1 HTTP request, -11.5KB (without gzip)
Gruntfile.js: use the variables for paths.
Fix device sprite.

Use the standard W3C `background-position` property instead of the non-standard `background-position-x` one.
FIx property, once again.
Merge pull request #373 from twbs/docs-min-css

Minify docs CSS
Update examples.html

Change 'visit on your mobile device see the apps' to 'visit on your mobile device to see the apps'
Update package.json meta data
Use pygments-manni from Bootstrap docs.
Disable clean-css's advanced optimizations for docs.min.css.

It's causing code highlighting to fail.
Minify JS files too.
Docs: Use the minified ratchet.js.
fix padding for android tab bar
Merge pull request #392 from twbs/tab-padding

Fix padding for android tab bar
Merge pull request #386 from coliff/patch-2

Update examples.html
Merge pull request #378 from twbs/docs-min-js

Minify docs JS files
Add initial Travis CI support.
Merge pull request #394 from twbs/travis-ci

Add initial Travis CI support.