JGit 3.1 New and Noteworthy

# Features

## Commands

- Move ArchiveCommand into standard porcelain API
- Add path option to StatusCommand
- ResetCommand: Allow reset on unborn branch when ref not specified
- Enable LsRemoteCommand to work without local repository

## Library

- Add tgz, txz and tbz2 archive formats
- Add long filename, large file, and non-ASCII filename support to TarFormat
- Make sure checkout is not deleting folders outside the working tree
- Implement TransportLocal.open(URIish), this can be used for listing remote refs for a repository on the file system without having a local repository

## Command Line

- Make gc a public command