Merge pull request #176 from iuloshi/gh-pages

Updates to Guides, Grid page, & misc other edits
Update buttons.md

added descriptions for variations
corrected "pacific blue" to "pacific"
added padding specs to initial button description
Merge pull request #181 from mebates/gh-pages

Update buttons.md
Update form-fields.md

added squishy intro for Forms
Merge pull request #182 from mebates/gh-pages

Update form-fields.md
Copy edits 

General updates to word usage, voice
Changed uses of "be careful to..." for a more objective "do this"
Update accessible-interfaces.md

removed question about featured image
Merge pull request #183 from benguhin/gh-pages

Copy edits for accessible-interfaces.md
Update grid-and-layout.md

Added general description and style points.
Deleted 'Use' section
Merge pull request #186 from mebates/gh-pages

Update grid-and-layout.md
merging upstream/fixing conflict