Changes for easyer development

**I experienced..**
Forked and cloned client.
Opend in pycharm.
Created new run configuration.
Using Python 3.6.

**how to reproduce** if explanation is needed to reproduce the problem, add it here
Adding the client as modul to the run configuration creates missing utils problem.

**I expected...** write here what you think the best behaviour should be
Run the module without changing the working directory into src.

**Where the bug is / What should be done** if you have a suggestion for fixing the issue, add it here.
Check imports to make it possible running src as module like it is proberly intendet by Python designers.
Rename src to something like faf_python_client.