Wrong heading type in promises article
Merge pull request #841 from jakearchibald/master

Wrong heading type in promises article
Updates masthead for promises article
Adds shadow H5R logo for new masthead.
Merge branch 'master' of github.com:html5rocks/www.html5rocks.com
Changes masthead link
Updates combined styles for new masthead
Some nits from @annevk
Merge pull request #842 from jakearchibald/master

Some nits from @annevk
Merge pull request #843 from html5rocks/master

Updates to Jake's article and home page masthead.