Fixing corpnewt capitalization in README.md

Author: Dids

README.md

@@ -1,3 +1,3 @@
-[![Build Status](https://travis-ci.org/CorpNewt/ProperTree.svg?branch=master)](https://travis-ci.org/CorpNewt/ProperTree)
+[![Build Status](https://travis-ci.org/corpnewt/ProperTree.svg?branch=master)](https://travis-ci.org/corpnewt/ProperTree)
 # ProperTree
 Cross platform GUI plist editor written in python.