A pure Python implementation for Git based on Buliding Git

Supported commands:

• pit init
• pit add <files>
• pit commit -m <message>
• pit status
  • pit status --porcelain
• pit diff
  • pit diff --cached
• pit branch -v
  • pit branch <branch> <revision>
  • pit branch -D <branch>
• pit checkout <branch>/<revision>
• pit log
  • pit log --oneline