Missing requirements and data files in setup.py

[JanBednarik]

I have updated setup.py so I was able to reserve project name in PyPI. But it cannot be installed by pip now. Requirements are in requirements.txt

Requirements should be moved into install_requires in setup.py and dev requirements (like pytest) should be put aside into extras_require.

I think there are also missing data files like templates in distribution. Should be added by MANIFEST.in file or some param (package_data, data_files, ...) in setup.py