m2e-wtp got caught in a last minute API change Kepler M7 introduced - that caused the ORM facet error. Thats kinda expected to happen using Milestone builds - things can go bad.
What worries me though is how any of these errors should cause the __redirected.__DocumentBuilderFactory noy found error.
*THAT*'s just wrong and something if you see again do let us know ASAP since that is just not supposed to happen...at all :)