Speed to be set / stored per effect

[tobi01001]

As suggested in #16 may effects look different depending on the speed selected.

Possible enhancement in there:

• set and store speed for each effect (so every effect could be individually controlled)
• speed factor for each effect (could effect dependen value which acts as parameter for the speed e.g. 1% to 200%) - benefit: global speed control still possible / effective | drawback: even more controls...

[tobi01001]

Tried to implement this and the result can be found in the Speed_per_Effect branch.
Alpha Version

Edit: This seems to break performance at least with the Knob Control (memory issue?).