Move effect widget setup out of LegacySkinParser and into the setup() method.
Merge branch 'master' into features_effects

Conflicts:
	src/engine/engineflanger.cpp
	src/engine/enginemaster.h
Merge pull request #4 from ywwg/features_effects-echo-squash

Write an echo effect from scratch.
Merge branch 'features_effects' of github.com:rryan/mixxx into features_effects
remove unnecessary assignments.
Shorten parameter label names.