0.2.0-rc1

Massive restructuring of the library, huge number of breaking changes. A lot of improvements including a complete test suite, which will really help into the future. While I haven't had time to update the on-site documentation, all internal files are split logically and each mixin is thoroughly documented with examples and explanation in the comments. So for now, the source is the docs.

Major Changes

• Depends on nib - this means all nib functionality is automatically present in axis
• Any elements named the same as html tags prefixed with a $
• All vendor prefixing removed (except for what nib does), use autoprefixer-stylus for this.
• Gradient functions greatly simplified - will now accept either one or two colors, so simple*-gradient is gone.
• Grid removed. Use jeet for this.

Look out for a major release over the next few months - for now feel free to use this version, it should be stable enough. If not file an issue and I'll get a quick fix and release in.