LB-980: Wrong author in timeline

Removed AuthorName from timeline.

Conflicts:
	plugins/livedesk/gui-resources/templates/items/implementors/timeline.dust
Merge pull request #321 from nistormihai/liveblog-15

LB-980: Wrong author in timeline
LB-819: On timeline all posts are 2h before CET

Add userdate filter to twitter times.
LB-931: Delete the 'tweet' button above the timeline

Remove the button.
Merge branch 'lb-931-rm-twitter-button' into liveblog-15
LB-772: Collaborator posts show only after reload

Reset post list on init. It was trying to update non existing list.
LB-869 : On chained blogs beside the original user name also show his avatar