Windup 210: Simplification of Classification and Hint

Not sure if you will like the classification simplification, it is quite hacky.
However, I seperated both simplification to two different commits.

Both of them are now able to use the "pass variableName from Iteration" simplification.
I guess I missed when these methods were added. But why are they here? This doesn't seem like something that really belongs in an abstract base-class, does it? Looking at the code in IDE now, but if you wanted to explain your thoughts that might be good too :) Thanks!