use generic she-bang instead of hard-coded python3
Re-packaged with setuptools for standard installation

* '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!
use pkg_resources to access bundled files

* egg file can remain zipped
* see http://peak.telecommunity.com/DevCenter/PythonEggs#accessing-package-resources
  for details
adjusted test script: all tests pass

* renamed scripts/propka.py to propka31.py so that it can be run
  without import issues
* ran the tests and no difference to the fixtures was detected
added INSTALL and fixed markup in README
Merge pull request #2 from orbeckst/master

packaged for standalone installation (Python 3 and Python 2)
add a reference to the math.ceil note
add test framework

- add the ability to run tests from the top level directory via
  'python setup.py test'
- translate runtest.py into a test that runs under this framework
- add a __main__ section to Tests/runtest.py and change its indent to 4
  spaces; make no other changes to this script
handle structures with 100,000 or more atoms

- the pdb format requires a 5-character field for the atom number; the
  hybrid-36 format allows up to a ridiculous number of atoms