Integrate the server-manager functionalites

How it works:

• Well, I take the code from the server-manager and I put it in djangoLDP. :)

Expected improvements:

• easier versioning management between server and manager (relies on pip)
• drop server-manager from maintainance nightmare
• rely on django core functionalities (reduce code base maintainance and testing)
• leverage all django features for future evolution

Cost:

• 12h (6h30 already consumed)

The tricky part is already done. Now I need to clean up the templates and make some basic tests on windows.

Reference:

• https://python-behave.readthedocs.io/en/stable/django.html