Resolved merge conflicts:
- lib/Epub/Epub.h: Kept both upstream's cropped parameter and HEAD's thumb functions
- lib/JpegToBmpConverter/JpegToBmpConverter.cpp: Used upstream's version (dithering code moved to BitmapHelpers)
- src/activities/home/HomeActivity.cpp: Kept HEAD's comment about stack size
Added missing 1-bit dithering support to BitmapHelpers:
- Added Atkinson1BitDitherer class to BitmapHelpers.h
- Added quantize1bit() function to BitmapHelpers.cpp