Harvester Refactor
Crafter Social UI Integration work
Temporarily removing ui-plugin project from Git
Merge branch 'master' of https://github.com/craftercms/social

Conflicts:
	server/src/main/java/org/craftercms/social/notification/harvester/BaseHarvesterService.java
	server/src/main/java/org/craftercms/social/notification/harvester/impl/UGCAuditHarvesterServiceImpl.java