If you get errors like this

Screen Shot 2016-02-24 at 4.38.55 PM.png

The problem is you need to link the library. Add it as followsScreen Shot 2016-02-24 at 5.58.10 PM.png

 

Screen Shot 2016-02-24 at 5.58.17 PM.png

Screen Shot 2016-02-24 at 5.58.22 PM.png