Demo: iOS9 Content Blocker Extension in RubyMotion

I hadn't seen any example code for content blocking extensions in RubyMotion, so I wrote some. To use it, run the app in the device/simulator and under Settings->Safari->Content Blockers, flip the switch to ON.

Prior Art:

• https://www.hackingwithswift.com/safari-content-blocking-ios9
• https://github.com/HipByte/RubyMotionSamples/tree/master/ios/ExtensionsAndFrameworks