Merge pull request #48 from PowerShell/daviwil-patch-1

Add Øyvind Kallstad as a project maintainer

Author: daviwil

README.md

@@ -32,6 +32,7 @@ send pull requests if you'd like to contribute.
 
 - [David Wilson](https://github.com/daviwil) - [@daviwil](http://twitter.com/daviwil)
 - [Sergei Vorobev](https://github.com/vors) - [@xvorsx](https://twitter.com/xvorsx)
+- [Øyvind Kallstad](https://github.com/gravejester) - [@okallstad](https://twitter.com/okallstad)
 
 ## License