v0.2.0

Very big and massively breaking release. If you are using any of the previous stable versions in a project, do not upgrade and expect everything to work as before. What's changed:

• Axis is now built directly on top of nib
• Any mixins named the same as html elements are prefixed with a $
• simple-button and button have been merged
• brand new beautiful set of default colors
• new vertically-align mixin
• new image cacheing utility
• Tests for all mixins (whoo!)
• Bugs and inconsistencies fixed in a huge number of mixins

The documentation on roots.cx is now out of date, unfortunately. Although no functionality has been cut, some mixin names and parameters have changed. We are working on a new set of documentation that should be out in the next couple months, in the meantime, the source is very thoroughly annotated and documented, and organized exactly as the docs site is currently. I know the source is no substitute for docs, we're working on this though, promise 😀