#334 - oae-content test improvements

Extended coverage on:
 * getContent
 * canManage
 * hasAccess
 * getContentMembers
 * getLibrary
 * getComments
 * creating content with an unknown resourceSubType
 * joining and publishing collabdocs
 * relatedcontent and library searches

Also added a nextToken for the getContentMembers feed as I touched this area
Added callbacks to all fs.unlink calls
Improving README based on feedback by Rob Williams
#334 - code cleanup + lowered log level on certain ImageUtil errors.
Merged master into 334-content-test-improvements.
#334 - Lowered more logging
Merge remote-tracking branch 'simong/334-content-test-improvements'
Minor code cleanup
Issue 492 - Add nextToken to paginated REST feeds

Added nextToken to:
 * Content comments
 * Discussion members
 * Discussion messages
 * Group members
 * User memberships
Refactor of the Tenants API.

The Tenant API now allows for updating both the displayName as the
hostname.
Issue #639 - Added configuration options to map CAS attributes to OAE User profile information
Added a nextToken to activity streams.
Switched the startMatched and nextToken paramer in runPagedColumnQuery
Wrapping the output of getRevisions in a `results` and `nextToken`.
693 PR clean-up
(Issue 640) Add ability to configure preview processor to use insecure SSL
Merge pull request #634 from nicolaasmatthijs/README

Incorporate README feedback
Minor follow-up on 640
Merge branch '492-add-nextToken-to-paginated-feeds' of git://github.com/simong/Hilary into 492-add-nextToken-to-paginated-feeds
Comment fixes