Package for Sublime Text 3.

This fork contains some commits from Chris---/sublime-text-2-git fork, some original pull requests from kemayo/sublime-text-git and my changes.

• Git: Gitk All File - gitk --all <file>
• Git: Gitk File - gitk <file>
• Git: Gitk All - gitk --all
• Git: Blame (GUI)

• All new features from csch0's fork
• Context menu "Git - This File"

1. Open Command Palette → Package Control: Add Repository → https://github.com/phts/ImprovedGit
2. Open Command Palette → Package Control: Install Package → ImprovedGit