Initial commit. DNG to PGM. Works for Q raws.
Clean up (still does the same thing).
Trying to combine files. Results are broken. (Recognizable image though.)
Actually works now.
Write average instead of sum outside ActiveArea.

Not sure is this is better. At least on my Q, there always clipping without
this. No noticeable difference on the results in RawTherapee either way.
Sum exposure times for combined image.
Remove wellpapp dependency (by copying TIFF class).
Add README and LICENSE.
Add support for averaging exposures. (Plus arg handling.)
Simple sanity check on image size.
Clarify README.
Try to be smarter about black level.
Use array("B") instead of strings/lists to store data.

Disappointingly small speedup. (Negligible even.)
Special case reading 12 or 16 bits. (Noticeable speedup.)
Oops, fix incorrect bit fiddling in output.

Depending on bit width it might have made everything into noise, or in the
12 bit case, caused color casts.
Special case writing 12 or 16 bits. (Noticeable speedup.)
Calculate average (or reduced) ISO.
Try to be smarter about black level (again, yes).
Add --scale option.