Monochrome2DNG 1.6 Beta

This version includes the following improvements:

1. LibRaw decoder library updated to support more cameras
2. Implemented automatic mosaic correction method fallback for too dark or too light images:
3. In Preferences - Output DNG Tab:
   • Use simpler mosaic suppression if ‘Method B’ is likely to fail: this setting enables the fallback mentioned above:
   • Fallback to No suppression/Method A: turn off mosaic suppression or switch to 'Method A'.
   • Detection threshold: 0…1 - a lower value here means that a smaller deviation from the norm will trigger a switch to the simplified method.