Migrated to python3

I decided to migrate to Python3:

* Easier and better design performance than Bash
* Cross platform (so it *should* work on Windows systems too)
* Provides real unit testing
* Just... PYTHON FOR THE WIN!

Also made the [package available on PyPI](https://pypi.python.org/pypi/Hackety-Snippy) (pretty cool eh!).

The concept is not changed, the API, however, is completely rewritten from scratch, with lost of some functionality as consequence (although those functionality will be added in the near future, hopefully, or even better, replaced by more awesome features)