Add additional intent filter category.

Change-Id: I9002a22580682be4298401167337cf0f531c5801
Merge pull request #17 from devnook/master

Adding README file and fixing minor errors in the steps.
Enable action bar the right way instead of catching NPE

Change-Id: I52ecaca62f997b2522212f87ec713e5731e962b4
Update the end source code to use Play services from the SDK
manager.

Change-Id: Iefefebba157bc03923a777aa6d192a1e6e905562
updating codelab content