Add getForums method so a forum feed can be gotten and filtered by which
community (as opposed to a myforums feed). This fixes CommunityService
getCommunity too.
Fix exception in BaseEntity.
Re-adding the isDomNode check, seemed to have been removed.
Merge pull request #551 from fmoloney/ForumServiceGetForums

Forum service get forums
Fix if-else jshint problems. Conforms to dojo style guide.
Merge branch 'master' of https://github.com/OpenNTF/SocialSDK.git into SearchGridFix
Add API doc to getForums.