Start MixerActivity whenever settings clicked
Add button onClick functions
Remove unused onClick
Add function to sync Clip data to DE2
Add Command for setting pitch and playback speed
Check for null canvas(There's a bigger problem here)

This onDraw function really shouldn't be getting called if the canvas is
null.  This will sometimes cause the app to crash.  This is a hacky fix
for now.
Sync sound properties before playing the sound
Update Song setPitch and setPlaybackSpeed functions
Add min/max pitch and playback speeds
Add in sync and refresh buttons + repositioning