Load modules from a config file or autodetect them

[Otto-AA]

As mentioned in this todo it would be helpful to dynamically load the list of modules which should be started.

The current workaround is to change the modules list in manager.py and the one in main.py

[ErikBjare]

Actually, check out this old PR: #27

[Otto-AA]

Oh, I didn't see that one. That's exactly what I've wished for ^_^

[ErikBjare]

Should be fixed now that #56 is merged.