Set explicit PYTHONPATH for the app provisioner script, since the code needs to be able to import from absolute package names.
Ignore .coverage generated file.
Move development-time scripts to dev/ directory and add it to the path.

--HG--
rename : hg2gitignore => dev/hg2gitignore
Add runtests script to launch Nose (with Coverage) unit tests.
Add runcleantests to run with a blank database (which should be the norm anyhow).
Set the default database for psql already.
Provisioning works much better when you spell the library correctly.
Change the VM timezone to match the host machine.