fix cross clouds options
test
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
fixx
test
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Cloud book index fixes
Merge remote-tracking branch 'ta/master'
Fix cross clouds index page and create cross clouds error & success messages

Conflicts:
	app/assets/stylesheets/application.css
Fix cross cloud index page and create cross clouds succ & failure messages
Merge remote-tracking branch 'rt/master'

Conflicts:
	app/assets/javascripts/cross_clouds.js
cloud_book step2 fix
Merge remote-tracking branch 'ta/master'
Fix google oauth
Merge remote-tracking branch 'rt/master'
manage cloud books(rearrange), remove padding on cb_box(css), github icon in step2.