Minor changes fix
Merge remote-tracking branch 'origin'
node_creation_hash fix & email validation
fix typo in footer(twice terms_of_use), comment explicit <script angularjs> in application.html
Merge remote-tracking branch 'rt/master'
Merge remote-tracking branch 'ta/master'
enabled angularjs script load from CDN back. Will fix it later.
Add icons to the view cloud book, disable "Upgrade", chg history info to btn-block/disabled
Merge remote-tracking branch 'origin/master'

Conflicts:
	app/views/layouts/application.html.erb