SD-364 : Activity stream sync widget

Refactored and fixed notification.
SD-364 : Activity stream sync widget

Activity fixes.
SD-366 : New activities in the Activity stream

Finalized auto reload.
SD-351 : Server and API support for the Activity stream

Fixes for tests.
fix(SMTP) variables parsing
Merge pull request #168 from amagdas/master

fix(SMTP) variables parsing
SD-515 - On archive audio and video packages on ingest fetch, the reuters provider return not found error
Merge branch 'master' of https://github.com/ioanpocol/superdesk-server