Hello all. I have some questions about this theme. Where i can find complete documentation about this?

For example on dashboard (horizon): i have downloaded and unpacked https://launchpad.net/horizon/grizzly/2013.1.2/+download/horizon-2013.1.2.tar.gz and start ./run_tests.sh script. Also i configured new virtual host on my apache 2.4.4 with mod_wsgi 3.4. When I try to load home page of openstack_dashboard i get 500 Error "ImportError: Could not import settings 'openstack_dashboard.settings' (Is it on sys.path?): No module named cinderclient" , however "tools/with_venv.sh ./manage.py runserver" is working.

Or another example on nova (compute): after start run_test.sh i got error "pg_config executable not found". I want use Percona mysql server, but not Postgresql. Can I disable this dependence?