Install GitGutter plugin.

Konrad Blum · Konrad Blum · commit dfb7e6d22958 · 2013-09-02T11:12:59.000+02:00
https://github.com/jisaacks/GitGutter
diff --git a/Package Control.sublime-settings b/Package Control.sublime-settings
@@ -5,6 +5,7 @@
 		"Creole",
 		"Emmet",
 		"Git",
+		"GitGutter",
 		"Indent XML",
 		"INI",
 		"LineEndings",
