rEPPy became hEPPy

I had to turn rEPPy to hEPPy to register it to PyPI.
Reppy was already taken. And hEPPy is nice and happy :)

hEPPy is EPP client and library in Python.

EPP is Extensible Provisioning Protocol used for registrar-registry communication to register and manage domains.

hEPPy is gradually approaching state when it's going to be usable.