* camlibs/canon/canon.c: rmdir/mkdir support
* camlibs/canon/psa50.c (psa50_directory_operations): Consistently
return a gphoto2 error code.
* camlibs/directory: Add rmdir/mkdir support
* libgphoto2/gphoto2-camera.[c,h]
* libgphoto2/gphoto2-filesys.[c,h]: Add rmdir/mkdir support
git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@2823 67ed7778-7388-44ab-90cf-0a291f65f57c