CHDK:  - Fix height being overwritten with offset and offset not being read.  - Add configurable byteorder.
CHDK:
 - Fix height being overwritten with offset and offset not being read.
 - Add configurable byteorder.

anarsoul/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,klauspost/rawspeed,mgehre/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,anarsoul/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,anarsoul/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,mgehre/rawspeed,LebedevRI/rawspeed,klauspost/rawspeed,LebedevRI/rawspeed