* Fixes#82
* Changes:
* input arguments now reflects the changes made to read_molecule_file in #84
* Writing of pKa file is now optional (default behaviour has been kept). This will be particularly
useful downstream where we would just want to have access to the MoleculeContainer object.
* new test_run file specific for testing run.
* add tests
* add docs
* 'python setup.py install' will install
- a package 'propka' (which contains everything that 'Source' contained
in the original distribution)
- an executable script 'propka31' (which is identical to the original
'propka.py' script but it is automatically generated via the setuptools
mechanism; it uses propka.run.main().
* 'pip install' will also work
* the README.md file was changed to reflect the alterations
* metadata in the setup.py file was added
NOTE: The licence is still unclear!