Added unpack function
Updated position mixin to use unpack function on coordinates parameter
Updated position mixin to ignore falsy values
Fix transition defaults to work with firefox22+
Added settings section. Added global -base variable to px-to-em mixin
Remove opera prefix from the keyframes mixin
Update _transition.scss examples.
Add rem mixin for px fallback
Add 2009 flexbox partial support for IE10
changed button text size from fixed to inherit

the three button types had fixed font sizes of 11px, 14px, and 11px respectively. i find myself overriding them whenever present. i changed the values to 'inherit' so they match surrounding text, and can be overridden more easily.
Add Directional Property shorthands
Check if vals are the same
Add Roboto to the `$helvetica` font stack for Android support

Most Android devices do not have either Helvetica Neue or Helvetica available,
but as of Android 4.0 "Ice Cream Sandwich" there is a look-alike font called
Roboto that serves as a decent stand-in for the (better) Helvetica fonts.
Merge pull request #274 from jmmcduffie/add-roboto-to-helvetica-font-stack

Add Roboto to the `$helvetica` font stack for Android support
Merge pull request #265 from mikesusz/master

changed button text size from fixed to inherit
Merge pull request #258 from octave/ie10-flexbox-2009

2009 flexbox partial support for IE10
Added calc mixin
Include dist folder for use with Bower

The dist/ folder includes a build of the latest release. Combined with the
bower.json file, this enables the bourbon library to be installed via bower
for non-Rails web projects.
Merge pull request #277 from jasford/master

Include dist folder for use with Bower
Update image-rendering mixing to conform with the last specification.

More information at [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/image-rendering) page.