Allow for whitespace in app path.

Try running apps with whitespace in path on Android and iOS.
iOS: installApp() fails trying to install the app to the device using fruitstrap.
Android: processFromManifest() fails.
I assume appIsPackageOrBundle() will also fail since whitespace is not included in the regex.

I tested running on device (iOS, Android), don't know if we need more fixes for running on the emulator or using the app bundle, etc.