Added readme

Author: tomasbonco

README.md

@@ -0,0 +1,21 @@
+GitLab code tree view
+=====================
+
+This is browser extension for Chrome / Firefox / Opera (and maybe IE as well :) ) that provides tree view for code in GitLab (must have for code reviews!). 
+
+
+## Installation
+
+Chrome
+Firefox
+Opera
+
+
+## Contribution
+
+Star, if you like :) Open an issue, if you find a bug or you miss something. Send a Pull Request when you decided to extend/fix (thank you for that!).
+
+
+## License
+
+MIT 

manifest.json

@@ -4,7 +4,7 @@
   "author": "Tomáš Bončo",
   "version": "0.0.1",
   "manifest_version": 2,
-  "description": "Provides folder structure view for code review.",
+  "description": "Provides folder structure view for code in GitLab.",
   "icons": {
     "16": "icons/icon16.png",
     "48": "icons/icon48.png",