Touches app

Taking over touches app from https://github.com/appcelerator/hyperloop-ios/pull/23

WIP. Still have some errors.

- `UIView.beginAnimations(null,null)` crashes
- Missing constant `CGAffineTransformIdentity`
- App launches but shows nothing

## Fix 

- Fix: findMethod should search for protocols too
- Fix: lack of EXPORTAPI for externs
- Fix: touches app