Fix deprecation in serverside ents library

depreciated? really?
Also, applyTorque is now deprecated for much the same reason
Make docgen indicate deprecation on funcs/libs

The name is striked-through and whenever the description is shown, a
deprecation warning and the reason for deprecation are displayed
Deprecate net library in favour of signals
Merge pull request #74 from Xandaros/deprecation

Deprecation