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released date: 2018/7/20
* ``action`` in ``dropzone.create()`` can be URL or endpoint, ``action_view`` was deprecated.
* Add support to upload all dropped files when specific button (``name="upload"``) was clicked.
* Add configuration variable ``DROPZONE_UPLOAD_ON_CLICK``, ``DROPZONE_UPLOAD_ACTION``, ``DROPZONE_UPLOAD_BTN_ID``.
* Add configuration variable ``DROPZONE_IN_FORM``, ``DROPZONE_UPLOAD_ACTION`` to support create dropzone inside ``<form>``.
* Add configuration variable ``DROPZONE_TIMEOUT``.
* Add ``custom_init`` and ``custom_options`` parameters in ``dropzone.config()`` to support pass custom JavaScript.