Added custom config feature

Added the ability to pass config parameter and load a config from any directory.

Bug fix release

Fix a broken zip link on PyPi

Bug fix release

This release correctly captures stderr for the subprocess call

Bug fixes

Fix sourcing virtualenv inside Bourne shell.
Also allow loading the cd command from a config file.

Alpha release

I want to get this out and test it on some servers. Documentation & tests will be created in next Sprint.