initial version of iOS example incl. cocoapods and transit
fix: transit.retained[id] for JSFunctions uses wrong this, replaced with transit.r(id) that returns function. added some convenient methods, too
XType with added sound fx, music and vibration (closes #6)
fix: correctly handle calls if JS functions (if not exceeds 2 params or any complex arg contains TransitProxy, see #7) + JS errors as well as exceptions from native code that's been called from JS will be logged
Merge branch 'ios-example'