Appengine 1.4

This is a pull request from my currently working repo.  It's got a lot of stuff in it, but primarily:

aburgel's ancestor query work is merged in.
support for various devappserver2 issues, making stuff like dumpdata and loaddata work properly.
there's a hack in there for switching between dev_appserver and devappserver2.  Create a file called "force_devappserver.py" in the project root with a single line "devappserver_ver = 1" (or 2)