Moved all file error messages to the global array rather than un function text
Merge pull request #2847 from exussum12/errorMsg

Moved all error messages to global array
Updated grunt dependency versions.
Refactored last merge and updated version number.
Added destroyfailed event

Added possibility to inform user about failed deletes.

to be used with:
$('#fileupload').on('fileuploaddestroyfailed', function (e, data) {/* ... */})
Merge pull request #2859 from jbirkholz/master

Added destroyfailed event
Updated version number.