Merge pull request #219 from zackarhino/master

Fixed CONTRIBUTING.md file name

Author: nic0lette

CONTRIB.md renamed to CONTRIBUTING.md

@@ -40,7 +40,7 @@ If you've found an error in this sample, please file an issue:
 https://github.com/googlesamples/android-UniversalMusicPlayer/issues
 
 Patches are encouraged, and may be submitted by forking this project and
-submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
+submitting a pull request through GitHub. Please see [CONTRIBUTING.md](CONTRIBUTING.md) for more details.
 
 License
 -------