Combine files from input fields and dragged/dropped ones
Combine files from input fields and dragged/dropped ones

* The _$files array has been removed in favor of _files which contains all
  selected files bundled by their fieldname
* _detectFileInputs now store the input fields in _$inputs instead of _$files
* onFileSelect events will only be triggered on not excluded input fields
* Count files and sizes and verify those values before getting an instance
* Add files from input fields to preview areas

transloadit/jquery-sdk,transloadit/jquery-sdk,transloadit/jquery-sdk