Merge pull request #1 from FezVrasta/master

asd
make license clearer
added note about license
improved contrib.md
fix for #258
implement #304
improved documentation
fix for #294
Merge pull request #2 from FezVrasta/master

asd
fixed #313
fixed #315
added black and white buttons
new generic mixin
fix and added 'inverse' color
commented unnecesary style
placeholder working correctly
explanation added
Floating Action Button should float higher than Raised Button (See http://www.google.com/design/spec/what-is-material/objects-in-3d-space.html#objects-in-3d-space-elevation)
Merge pull request #324 from phoeagon/master

Floating Action Button should float higher than Raised Button
merging material colors