Rubymotion set iOS version and Retina

To set your iOS version for the simulator, set the target when you run rake:

rake target=7.0

Rubymotion 2.17 defaults the simulator to a retina device. To set back to non-retina:

rake retina=false

Example: when using a Macbook Air and running the default rake I get this:

instead, I run rake target=6.1 retina=false and get this: