Adopt naming schema from other controls in Mixxx.
removed "value_normalized" and use the normal value - parameter idiom
Added getDefault() to midi script api
removed CO value_default it is not needed since we have now getDefault() in script API
Removed min max COs from EffectParameterSlot this is a redundant concept with the inter control solution. If we later have a usecase that a min or max value should be tweakable for a effect, this effect might handle it intern by a new dedicated parameter.
added getDefaultParameter to the script API
added controleffectknob.cpp
set type from control hint
make bitchrusher bit_depth float
make bitchusher downsample logarithmic and inverse to match bit_depth
fixed remaining log issues
Merge pull request #207 from daschuer/co_clean_up

Adopt naming schema from other controls in Mixxx for effect parameters