Added Yahoo OAuth.
Added Yahoo auth icon.
Fix 'next' for yahoo sign in url.
Fix generation of full name.
More errors handling.
Yahoo icon replaced by Hacker News.
Merge pull request #21 from gmist/yahoo_oauth

Yahoo oauth
Updated fontello and fixed the Yahoo brand
Merge branch 'gae-init'

Conflicts:
	main/static/src/style/signin.less