Uncompilable pieces of code

[cerna]

This is and should be part of tackling of issue #200, of which the progress can be followed in #349.

There seems to be a number of modules (for lack of better word - small pieces of code with mostly isolated functionality) which currently do not compile and obviously were not able to compile for some time. I am currently not sure what to do with them, however I am of the opinion that all (or at least most of the) code should be compiled (in CI run).

The problems include:

• HAL modules using non-existing (wrong, deprecated, new etc) instantiate API
• Code being in Work-In-Progress state and never actually finished