libfreenect Merge Update #2, BREAKING API EDITION

[Kyle Machulis]

So, here's what I just brought into unstable

- zarvox's high res images. THIS BREAKS API. See his email on this list to see exactly what it breaks: http://groups.google.com/group/openkinect/browse_thread/thread/813c998eaa866b2e

- cpp demo scoped lock

- python/cython fixes

- python cv threadholding demo

There's quite a few things on the "needs fixing before I can merge" stack, so expect more emails soon.