Performance improvements

- Zoom when focusing manually
- Audio-input selector - supports bluetooth/wired microphones

- Add ability to start and stop recording with volume-up button
- Bluetooth shutter (only those that do volume-up)

- Gyroflow GCSV support
- Optical/Sensor-shift stabilization toggle
- Horizon indicator
- Fix 0.5 lens not working for some phones

- Remove stabilization toggle for now, which caused recording to not work on some devices.

- directly save to DNGs instead of MCRAW, with about 10-15% lower size
- Optical/Sensor-shift stabilization toggle
- Lots of under-the-hood improvements

- Fix wide-angle lens -> can now record proper frame rates
- DNGs should now be valid in DNG validator

- 30 FPS option
- Fix frame drops on some phones
- Histogram with Highlight Clipping indicator integrated + Lens calibration for accurate highlight clipping
- More robust audio recording
- Storage indicator
- Stop recording on too little storage
- Video Playback in the gallery
- Added External storage view in the gallery
- Fix black bars on sides for some lenses on some phones