v0.0.1

Initial test release

git-gui is my favourite interface for separately reviewing code from the place it's written, crafting commits with selected lines.

But git-gui requires a separate window per repo, and the macOS dock has issues with wish.

Git Guis is just the bits I use from git-gui (and a little bit of gitk) in a tabbed interface.

Notable differences:

• Cmd + T also supports staging/unstaging selected lines