general optimizations
eq
EQ on/off fix EQ auto preamp
reverb
Merge branch 'master' of https://manushanga@github.com/manushanga/vrok.git

Conflicts:
	effects/shibatch/eq.cpp
	effects/shibatch/eq.h
	frontend/eqwidget.cpp
	frontend/eqwidget.h
	frontend/vrokmain.cpp
	frontend/vrokmain.ui
	include/vputils.h
	vrok.pro
added reverb