Fix Ubuntu installation instructions.
Merge pull request #31 from c0d1f1ed/install

Fix Ubuntu installation instructions.
Avoid subprocess call for repository initialization.
Repo.branch(): Default to repo HEAD if no commit_sha was specified.
Simplify staging by calling out to dulwich convenience function.

Fixes some tests.
Cope with changes in branch_list() API
Pass DIR to Repo.status, as it is now mandatory.
Added password prompt for git urls with format https://username@server.com/path/repo.git
Updated version to 0.16.1, includes password prompt.
Added username and password prompt dialog.
Added username/password dialog to pull and push, based on messages.
Updated username/password prompt dialog.
Merge pull request #39 from jelmer/fix-gittyup-tests

Fix gittyup tests.
Added username/password prompt to clone.
Added username/password prompt for clone. Updated readme.
Replaced tab indents with spaces.
Merge pull request #46 from primaryobjects/master

Username/Password Prompt for Clone, Push, Pull
#34 Python 3/gedit 3.8+
Use dulwich.porcelain.tag for tagging.
Use dulwich.config.ConfigFile.