IPhoneFileSystem doesnt write temp data

CopyFromRemote does not leave temporal data created in case of error
copying the file
IPhoneNet correctly escaping URI

Now correctly escapes URI to avoid address problem
IPhoneResourceHandler access to filesystem

It correctly Unescape URI to access the filesystem files
IPhoneViewController stops audio when closes view

Fixed a bug that caused the audio or video file to continue playing even
when the webview was closed