Added folder upload.

Fixed IE10s InvalidStateError bug.

Fixed travis tests

Added the addRemoveLinks option. Lots of improvements.

Fixed Firefox progress update problems and travis.

Dropzone.forElement throws an exception now instead of returning null…

… if no Dropzone.

Added .headers option and encoding X-File-Name now.

Added the possibility to define multiple clickable targets & bug fixe…

…s & improvements.

Added dimensions to file object, a totaluploadprogress event and the …

…possibility to define the resize function.

Improved the CSS attributes for the hidden file input.