Merge pull request #451 from phatblat/phatblat/pr/carthage-badge

Add Carthage badge to readme

Author: jspahrsummers

README.md

@@ -1,5 +1,7 @@
 # ObjectiveGit
 
+[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
+
 ObjectiveGit provides Cocoa bindings to the
 [libgit2](https://github.com/libgit2/libgit2) library.