** Added multiple check into material file field javascript 
** Reorganized material file field javascript code
** Generalized temp file handling from TempFileUploadServlet into
TempFileUtils
** Added getTempFileData and deleteTempFile methods into TempFileUtils
** Added throws MaterialQueryPersistanceExeption into persistField
WorkspaceFieldHandler
** Added draft of workspace file material answer persistance
** Added entities for persisting workspace material file fields
** Added methods for creating, retrieving and deleting of file fields
and file field files into WorkspaceMaterialFieldAnswerController
** Added initial version of file field save support into workspace
plugin