update array
CB-8093 Fixes incorrect FileTransferError returned in case of download failure
Merge branch 'CB-8093' of https://github.com/MSOpenTech/cordova-plugin-file-transfer
Merge branch 'CB-8014' of https://github.com/marti1125/cordova-plugin-file-transfer
Alias FileTransferError to FTErr to save some horizontal space
alias appData to Windows.Storage.ApplicationData.current
Error callback should always be called with the FileTransferError object, and not just the code
exec guarentees that proxy is called with success/error function so there is no need to constantly check that it exists
removed unneeded String() casting all over the place, fixed my own missing ) error