Rastermode fixed and Dithering speed improved
Today I finally found the problem with the raster mode in the Epilog Driver. It was simply the bit-order. So I adapted the BlackWhiteRaster bit representation and removed the unnecessary invertByte() calls from the Epilog Driver.
I also fixed a problem with the Average Dithering algorithm which occured on large images because of a int overflow.
Finally I tried to optimize the dithering speed by removing some steps in the rendering stack.
Please test the current git version and check if everything works as desired.