New Unit Tests for PagedQuery

[Ben from He3]

I've just added some Gaeunit (http://code.google.com/p/gaeunit) unit
tests for PagedQuery.

I have included the gaeunit.py script and a simple app.yaml file. To
run, simply checkout the trunk and launch the development server
pointing at the source folder. Navigate to the local /test folder in
your browser (probably http://localhost:8080/test) to run all of the
tests.

http://code.google.com/p/he3-appengine-lib/