usermanual: add missing hint in exposure module
Italian translation updated
Merge pull request #590 from bartokk/master

Italian translation updated
lua : fix tags reporting all images instead of the ones attached to them
lua : gui functions are only available when gui is enabled
allow to pass a lua_State to dt_init

This lua_State will be used if provided.
if set to NULL, a new one will be created instead
lua : fix fomat.write_image not working properly
lua : allow darktable to be a pure lua module

you can now call DT from any lua script without an actual
instance of DT running
rawspeed: update to current develop branch
rawspeed: remove some cruft
rawspeed: better cleanup for update script
lua : add the possibility to import/export styles
Add the new MEF decoder for Mamiya raws
Add the needed data for the Mamiya ZD
Add MEF files to the libraw blacklist
Remove left-over debugging code
Replace ARW with MEF in some error messages
Merge pull request #591 from pedrocr/rawspeed-mamiya-support

Add rawspeed support for the Mamiya ZD
Add a new decoder for Hasselblad files
Add definitions for two Hasselblad cameras