Replaced sqlspaces plugin with activitystreamer

This change removes sqlspaces support and instead adds activitystreams
in a seperate table. activitystreamer includes the same extended log as
sqlspaces but implements conversion to json-activitystreams based on
activitystrea.ms
Merge pull request #2 from odaems/master

Replaced sqlspaces plugin with activitystreamer
Merge clipit_befe into master