Added jQuery fileupload
Refactored media plugins to use base class and added methods to get import and export mime types and file extensions
Added methods to get import/export file extensions and mimetypes
Added support for drag-and-drop media upload in batch media processor
Merge branch 'master' into fileUpload
Merge branch 'master' into fileUpload
Merge branch 'fileUpload' of http://github.com/collectiveaccess/providence
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