Comments box backdrop div missing

Added
LB-656:Locally deployed Embed URL (stt theme) -> YouTube video was halved when the iPad was hold in vertically long position

Resolved for frontend themes.
Styling embed user comment posts

Finished
Conflicts resolved
LB-726: Create a theme for big-screen

Added right-panel.html
Merge pull request #187 from nistormihai/devel

LB-726: Create a theme for big-screen
Merge pull request #188 from nidzix/gen-tv-css

LB-726 : Create a theme for big-screen
Create sms.dust
Create comments.dust
Merge pull request #181 from nidzix/user-comments-fix

LB-656:Locally deployed Embed URL (stt theme) -> YouTube video was ha…
Merge remote-tracking branch 'sourcefabric/devel' into liveblog-15