Do the fast, first-stage burn of the rocket. Begin implementing both the framework and the command-line tool.

This is headed in the right direction but may still be grossly misleading. It certainly doesn't run. Extremely, extremely high-level feedback welcome. Don't come to me about spelling.
Make `python -m shiva_the_deployer` work again.
Polish readme a bit.
Get the first test working. Also...

* Make `python setup.py test` work.
* Refactor main routines to be more testable.
* Add an abstraction around virtualenvs.
Don't trip over python executable paths or deploy script paths with spaces in them. Fix a circular import.