Python interface and Python tools

I have implemented a direct interface to PINY in Python and would like to include it in the code.

There are also some tools to prepare and post-process PINY calculations. Using the input generation tools, it is possible to run a PINY calculation entirely from Python.

Most of the pull request is new files. There are some small changes to the build, but these located only in new `compile` directories that I have added. There is only one small change in the source code itself - I have separated an init function from main() to make like easier on the Python side.