Add note about composite arguments for nth-omega()
Fix typos in README
Add flexibility to pad() #25
Update pad() documentation

* Remove version in main scss file
Add contribution guidelines
Fix typo in CONTRIBUTING
Make last child in table layouts keep its right-padding
Merge omega() and nth-omega()
Update copyright year to 2013
Update MIT-license and `_neat.scss` years
Bump to 1.1.0
Fix typo in NEWS
Fix typo in README
Test Neat features using RSpec

Closes #54
Refactor matcher and add spec for outer-container
Add spec for span-columns()
Add spec for row()

* Write better descriptions for other specs
Add spec for shift() and pad()

* Use keyword 'context'
* Use explicit values when appropriate
* Write better example descriptions
Add spec for media()

* Closes #58
Set table layout on container or row element