Module dependencies

[jolange]

In the current setup all module dependencies are effectively dependencies for HappyFace (given that you check out HappyFaceMonitoring/HappyFaceModules).

I particularly noticed this with the htcondor and feedparser imports. This is obviously not optimal, since you either have to install them or remove the imports (which does not harm if you do not use the corresponding module anyway, but is not really a solution).

In the current setup I think they should be listed as dependencies. A better solution would be to only import modules that are really used. But that certainly needs a clever mechanism.
Any thoughts on this?