Android Demos Installation

I have imported the Demos folder into Eclipse as an Android project with already existing source and I have run it on my Nexus 5 but as soon as I launch it, it crashes. Also if I try it with the emulator it crashes.
I have a Mac Book Pro, I have also tried to build it with gradle but I haven't quite understood how it works with Mac.

Please see: https://github.com/Estimote/Android-SDK/issues/38