Implement abrupt hy cg interface

[J-Hizzle]

Solves #29

[J-Hizzle]

clang-tidy suggests making Slab::interfaceType_ of enum type in order to secure the switch in setWeightInHY. I tried implementing that, but I don't really know how to properly handle enum type member variables.

[XzzX]

clang-tidy suggests making Slab::interfaceType_ of enum type in order to secure the switch in setWeightInHY. I tried implementing that, but I don't really know how to properly handle enum type member variables.

Reason for the warning: Since int allows many values you always have to cover all possible values in switch cases to be save nothing strange happens if the user puts in an int you did not expect. C++ offers enum classes that restrict to only well defined values and gives them meaningful names.

See 029ae48

[XzzX]

There are a lot of ifs that might deteriorate performance. However, the design is clear. So I would keep them until we see performance problems.