Decorate `setUp` as opposed to `__init__`

This way we're allowed more time to start the required Salt's testing daemons
Deprecate `salttesting.parsers.run_testcase`
Update `setup.py` to install our `salt-runtests` script and install `argparse` under Py26
Provide a simpler decorator to skip on tests which require root perms
Add the base configuration required to run salt's test daemons
The salt testing tests runner seems to be in good working order
Fix typo