add git, gitgutter config and Open In Browser

Packages/User/OpenInBrowser.sublime-settings

@@ -0,0 +1,9 @@
+// Open In Browser Settings - User
+{
+    // Set enable to false to disable this plugin
+    "enable": true,
+    // Custom browser setting can be used to set a default browser to open links
+    "custom_browser": "Safari",
+    // Make this true to get links beside URLs only on hover
+    "only_on_hover": false
+}