From Sukender, "Added vertical flipping to the writer depending on the Image::getOrigin() value (= flip the image when Image::BOTTOM_LEFT). Most of the time this will not change DDS writing (= no v-flip), as it seems images are rarely "BOTTOM_LEFT". To skip this behaviour, the "ddsNoAutoFlipWrite" option was added.
I also moved a few lines of code about "dds_flip" option, and made options reading more like in other ReaderWriters."
From Sukender, "Added ".dds" file deletion on writing failure."