We should be able to use client side storage when possible.

1. When uploading a file we should use the local file until the data is uploaded
2. On cordova, packaged apps etc. we actually have access to a filesystem, we should be able to utilize this
3. Caching and preloading of files requires some form of control with the client-side data

Its tricky to handle files on the client-side, we have a lot of problems here in form of performance, synchronization, memory allocation etc.

But we can make the app seem faster by doing forms of latency compensation, caching and preloading. Using blob object reference urls instead of dataUrls saves memory - and if used correctly we should be able to keep track of usages eg. ui helpers should have both a constructor and destructor function - or we could keep track of published files on a FS.Collection.