DSPManager load/save/delete presets. Change min/max EQ db. Live folder fo

DSPManager load/save/delete presets.
Change min/max EQ db.
Live folder for Bluetooth/speaker/headset.
EQ Bitmap caching so scroll is faster.
Watches for android.bluetooth.a2dp.action.SINK_STATE_CHANGED to detect Bluetooth headset (works great with Jabra BT3030)

NOTE: First time using git, hopefully everything's worked ok. Cheers