.add on non-iOS platforms

[tonylukasavage]

Currently the .add code on non-iOS systems will copy the files to Ti.Filesystem.applicationDataDirectory. This makes it trickier to add say an image file and then use it in a createImageView() call.

ios

> .add pic.jpg
undefined
> var image = Ti.UI.createImageView({ image: 'pic.jpg' }); 
undefined

android

> .add pic.jpg
undefined
> var image = Ti.UI.createImageView({ image: Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, 'pic.jpg') }); 
undefined

[tonylukasavage]

This was resolved in #86