LB-723: Add provider error after incorrect url has been provided

Test provider url before saving.
Fix localization.
LB-695: Switch from Chained/LiveBlog tab-> switch to autopublish is not preserved

Fixed.
LB-695: Switch from Chained/LiveBlog tab-> switch to autopublish is not preserved

Fixed.
LB-754: Create zeit theme

Fixed.
Merge pull request #209 from nistormihai/zeit

LB-754: Create zeit theme
LB-659: clicking on Publish for certain FB posts leads to error

Created the upgrade script
LB-754: Create zeit theme

changed made by Nikola added.
STT theme fix

> soundcloud icon added
> compact1 and mobile classes margin bug fix
> comment icon added for comment posts
> soundcloud iframe double height bug resolved
Merge pull request #210 from nistormihai/zeit

LB-754: Create zeit theme
LB-589: Doplicated posts in embed after reordering.

Fix view lookup.
LB-739: Can not publish some FB posts

Added a warning message if FB post is > 3000 chars saying that the post
has been trimmed to fit that
Default embed theme CSS refactor

> soundlocudpost sourceicon added
> soundcloud iframe bug fixed
> liveblog header bar changed
> IE default border on image links removed
> change text line height for better readability
Tageswoche theme CSS refactor

> header changed
> soundcloud icon added
> youtube and soundcloud responsive embed objects
> youtube remove default blue link color on title
LB-737 : Embed URL-> STT theme -> Permalink hyperlink is NOT presented adequately on all browsers and devices

Fixed
Merge remote-tracking branch 'sourcefabric/liveblog-15' into embed-themes-fixies
LB-743: User Comments - option to disable the user comments per blog

fixed error if no embedconfig json avalible.
LB-755: Comments seem stopped working

Hide comment message box.
Merge pull request #214 from petrjasek/lb-755-comment-box

Lb 755 comment box
Merge pull request #213 from vladnicoara/facebook-post

LB-739: Can not publish some FB posts