Log Message:
Update to 9.20. Move options handling into options.mk.

Changes:

Use lcms2 instead of lcms.
Can now use "-M" with a DNG file that embeds a bad color matrix.
Improved support for Nokia cameraphones.
Support the Alcatel 5235D, Powershot G16 and S120, Pentax K-3, etc.
Added tone curve for Canon RMF files.
Copied color matrices from DNG Converter 8.3.
Support blacklevel patterns up to 64x64.
Support the Kodak 12-megapixel camera(s).