Fix width of button in small layouts (Bug 837914)
Bug 760823 : Email for hr contribute form
Bug 842858 - styleguide updates

* Expanded FxOS branding page
* Added FxOS color page
* Added color values to Firefox and Mozilla color pages
* Misc copy updates in communications

FxOS promo materials page still pending, commented out for now but this commit includes the partial page
[Fix Bug 846294] marketplace hero image breaks at mobile sizes
Merge pull request #620 from sgarrity/bug-837914-marketplace-button

Fix width of button in small layouts (Bug 837914)
Merge pull request #658 from Sancus/master

[Fix Bug 846294] marketplace hero image breaks at mobile sizes
Merge pull request #656 from brianking/contribute

Bug 760823 : Email for hr contribute form
Merge pull request #657 from craigcook/bug-842858-styleguide-updates

Bug 842858 - styleguide updates
Bug 831798 Update theme on Firefox First Run page
Merge pull request #660 from sgarrity/bug-831798

Bug 831798 Update theme on Firefox First Run page
Merge pull request #659 from craigcook/master

Bug 846537 - remove star ratings