Etherpad integration
Added the HTTP protocol to the etherpad configuration.
Added the Etherpad API key to the travis file.
Restoring revisions.
Letting etherpad-lite-client point to simong his repo.
Reverting etherpad-lite-client to latest (0.6.0) as it has been made available.
Merged master.
add more supported image types
(MqCluster) Replicate queues to all cluster members. Better startup/shutdown graceful handling in server.js
Merge branch 'master' into etherpad2

* master:
  Remove global flag from value regex
  Fixed type of parameter in a doc
  Simplifying skinning variable replacement loop
  Replacing default skinning variables as well as tenant-supplied values
  Making skinning aware of UI hashed file mappings
Merged master.
(PP-refactor) Fixed up some JSDoc + JS syntax
Fix typo, remove unneeded parameter
Merge branch 'master' into mq-cluster
(Issue 466) Add config option to purge rabbitmq queues after connect but before subscribe
specify deps for preview-processor and activity
stub READMEs for oae-modules
Unit test improvements and minor fixes for the oae-principals module
Merge pull request #475 from stuartf/npm-fixes

Npm fixes
Merge pull request #468 from mrvisser/mq-cluster

(MqCluster) Replicate queues to all cluster members. Better startup/shutdown graceful handling in server.js