otherwise, implicit transitive linking will pull in the installed
libs, not the ones from the source tree, and the build can fail when
any of the libs' APIs changes.
Also remove some useless #includes.
Apparently Lua chokes when it sees c:\darktable\... as a path to a script,
thinking the '\d' was an escape sequence. Thus we have to add an extra
layer of escaping. Houdini like. Who came up with the brilliant idea to
use '\' as a separator anyway? So much pain just to be different?
Hopefully it works, since that's untested (I have no MacOS access). This
is mostly code from file-darktable.c, made generic and factorized into
file-raw-utils.[ch]. At least it still builds and work fine on Linux.
I used the CFBundleIdentifier from `tools/osx/Info.plist.in` in
RawTherapee code. I didn't add a Win32 registry key base though, since I
couldn't find any relevant data for this in RawTherapee code.
