Use __version__ for versioning in case someone uses this package as a module.
Rename methods according to PEP8.
git_repositary_path->git_main_repo_path, baselevel->git_repo_submodule_path.
Refs #13. Rewrite list_files to limit exclude patterns by module.
Increment version.
Fix mutable default argument.
Fix typo: Recurses -> Recurs.
Specify file encoding.
Use uppercased default prefix.
Refs #13. Build exclude patterns tree before traversing git files.
Refs #13. Don't use unstaged .gitattributes. Don't mix exclude patterns from different repos.
Use the cwd argument instead of chdir.
Add comments, set version to 1.5. Fix PEP8 errors.
Fix ascii codec error when help is shown.
Add --dry-run to README.