Merge branch 'master' of https://github.com/paymill/paymill-python

* 'master' of https://github.com/paymill/paymill-python:
  Update README.md
  Imports enhanced, some housekeeping done.
Merge branch 'master' of https://github.com/paymill/paymill-python

* 'master' of https://github.com/paymill/paymill-python: