Adding camus-wmf subproject and setting wmf version to -wmf3

This versioning scheme was discussed between qchris and otto in IRC.

Change-Id: I31448247ddbb161a703c2e942f22fc23ed084288
Force maven to only use WMF's Archiva

Change-Id: I15fe4af03faa68c132770e9b100b55eef2a262b6