SD-364 : Activity stream sync widget

Refactored and fixed notification.
Merge branch 'master' of github.com:superdesk/superdesk-server
Merge branch 'master' of github.com:superdesk/superdesk-server
SD-364 : Activity stream sync widget

Activity fixes.
Merge branch 'master' of github.com:superdesk/superdesk-server
SD-366 : New activities in the Activity stream

Finalized auto reload.
Merge branch 'master' of github.com:superdesk/superdesk-server
Merge branch 'master' of github.com:superdesk/superdesk-server
SD-351 : Server and API support for the Activity stream

Fixes for tests.
Merge branch 'master' of github.com:superdesk/superdesk-server
SD-351 : Server and API support for the Activity stream

Integrated with the base model for activity logging
and added some basic messages.
Merge branch 'master' of github.com:superdesk/superdesk-server

Conflicts:
	superdesk/activity.py
SD-351 : Server and API support for the Activity stream

Identation fixes.
SD-351 : Server and API support for the Activity stream

Small fixes.
SD-351 : Server and API support for the Activity stream

Refactor.
Merge branch 'master' of github.com:superdesk/superdesk-server

Conflicts:
	app.py
	superdesk/activity.py
	superdesk/archive/archive_media.py
Merge branch 'master' of github.com:superdesk/superdesk-server

Conflicts:
	app.py
	superdesk/activity.py
	superdesk/archive/archive_media.py
SD-564 : Proper messages for the activity streams

Small message adjust.
SD-465 api design for coverages
the coverage module