- Update shebang.
- Drop encoding line, useless in Python3.
- Use GObject rather than gobject.

Currently, the filesystem fixes are applied only for FAT, in which these
special characters (:, ", etc.) are actually forbidden. NTFS, however, will
allow you to create file names containing these characters, but Windows will
still be unable to deal with the files (even to rename them!).

--fs-fix=force will be useful when copying to a NTFS filesystem that will be
read on Windows.

--fs-fix=no is the same as --no-fs-fix.

--fs-fix=auto is the same as the current default behaviour (i.e. fix names only
for FAT).

- updated .gitignore
- updated README to markdown format
- deprecated distribution
- updated optparse to argparse
- deprecated all coding functions
- fix some syntax errors

Now this package should be python3-only.

- return 2 if files have not been copied
- return 1 if file have been copied but errors occured

- gcp DIR1 DIR2 where DIR2 exists is fixed
- special case gcp DIR1 DIR2 where DIR2 doesn't exist managed
- comments update
- refactore source_path in source_dir