Setup.py build does not require Ruby and mustache.

The mustache functionality was replaced
by python packages yaml and pystache.
The extension can be built with one command
using setup.py

This setup will probably complicate the end user installation,
since it requires cython, yaml and pystache packages.
On the other hand it allows easy standard distutils installation via setup.py
and can be better for developers.

The installation can be done in one command (which takes quite a long):
`python setup.py install`
for developing is usefull
`python setup.py build_ext --inplace`