Only load visualizer when started
Fix VS/EQ not being visible in landscape mode
Release the visualizer object when not being used
Only start Equalizer if actually being used
Release Equalizer when user unchecked enabled and backs out
Start of adding Master EQ level setting
Fix crash when exiting Equalizer activity
Closes #59 Add Master control to EQ
Fix Master volume not working well with presets
Merge origin/EQ