NR-462 : Upload User Image functionality missing

added avatr to manage collaborators screen
NR-462 : Upload User Image functionality missing

avatar on manage collaborators add window, and display full name in the list
NR-532 : User is still marked as a collaborator for certain blog despite un-checking the corresponding check-box + saving

added error message in case changes to password, collaborator status or user properties fail to be made
User page restyled
NR-606 : File upload not working in media archive
NR-607 : Unable to save user changes

fixed
Merge branch 'devel' of dev.sourcefabric.org:superdesk into devel
Liveblog style fixies
Merge branch 'devel' of dev.sourcefabric.org:superdesk into devel

Conflicts:
	plugins/livedesk/gui-resources/templates/edit.dust
NR-595 : Update the welcome page
NR-595 : Update the welcome page

First
NR-595 : Update the welcome page

Minor change
NR-595 : Update the welcome page

Commiting early progress
NR-595 : Update the welcome page

Misc
NR-595 : Update the welcome page

Misc
NR-595 : Update the welcome page

Some work on live blogs
NR-595 : Update the welcome page

with published items
Merge branch '595-update-the-welcome-page' of dev.sourcefabric.org:superdesk into 595-update-the-welcome-page