LB-1550 : Don't show preview controls when no previews are available

Fixed
LB-1525: As a user, I want to have a generic theme available that doesn't have a scroll bar

Fixed
Merge pull request #676 from ioanpocol/liveblog16

LB-1569
Update readme.md

Added info about AGPLv3 license type
Create LICENSE.txt
Merge pull request #675 from nidzix/liveblog16

UI improvements
LB-1657: Update rp.superdesk.pro with latest Live Blog

Build for themes.
Merge pull request #677 from nistormihai/liveblog16_clean

LB-1657: Update rp.superdesk.pro with latest Live Blog
LB-1533
:
Write REST API tests for embed

Added embed tests on superdesk/rest_tests