v0.0.0

This is the first alpha version that has following pre-stable features

• Gin to call a raw git command
• GinChaperon to solve git conflicts (like git mergetool)
• GinDiff to see git diff of a file
• GinEdit to see git show or local content of a file
• GinPatch to stage changes partially (like git add -p)
• GinStatus to see git status of a repository

Some features are missed from https://github.com/lambdalisue/gina.vim but users can use both to gradually migrate.