Repair grunt watch

Fixes #99
Merge pull request #102 from Scotchester/gh-pages

Repair grunt watch
Merge pull request #103 from ohsk/gh-pages

Update column and type formatting for Guides > Design principles page
Updated link and copy on Identity > Typography pg > Web type accessibility section, #100
Ben wants to kill the Downloads section from the main nav.
Merge pull request #105 from iuloshi/gh-pages

Removed "Download" section from nav and updated Web type accessibility copy