adobe_coeff: FUJIFILM X-Series support

Coefficients via dngmeta.sh. These match those in dcraw 9.21, except
for black/white levels which dcraw does not give.
Merge pull request #593 from dtorop/xtrans-adobe-coeffs

adobe_coeff: FUJIFILM X-Series support
rawspeed: update to current develop branch
Merge branch 'master' of https://github.com/darktable-org/darktable
Fix typo.
Rename module to module_version which is clearer.
Merge branch 'master' of github.com:darktable-org/darktable into xtrans2-dev
don't need to set dcraw magic for x-trans filter

In dcraw, filters == 9 means an X-Trans image, which carries over to
code for dt handling X-Trans images. The latest RawSpeed sets filters
to 9 for X-Trans, so no need to do it again in imageio_rawspeed.cc.