Add Python Interface

[JCoym]

This pull request adds a Python interface for the KV, Object, Distributed Object and Item clients.

[michaelkuhn]

Could you please rebase and squash this? This is currently split up into a few too many commits.

Have you had a chance to track down the bug you mentioned or is it still present in this version?

[JCoym]

The error still remains unresolved.
When writing >16 Bytes using the Python Object Client, the data correctly arrives in j_object_write of the C interface(Checked with a print in j_object_create), but then in the saved file, and therefore also in following reads, the first 8 Bytes are corrupted.

[JCoym]

The error is now resolved with the newest commit 44e13b4