Merge pull request #407 from ioanpocol/citizen

LB-1160:
Merge pull request #408 from ioanpocol/citizen

LB-1160:
Merge pull request #409 from ioanpocol/citizen

Citizen
LB-1160:

As an editor I want to hide user comments posts

Fixed for since and until conditions on cId
LB-1193 : Posts from chained blogs are arriving to normal post section instead of chained blog section

The creator attribute is set to the new created user from remote author
or creator (in the case that the autor is not a user, as flickr,
facebook, twitter)
LB-1177 : Add SMS provider and add functionality to copy SMS posts to every source
Merge branch 'citizen' of https://github.com/ioanpocol/Superdesk into citizen