** Changed injected property into private in
WorkspoaceMaterialFieldController
** Removed unused imports from WorkspaceHtmlMaterialBackingBean
** Generalized assignMaterialFieldNames method from
HtmlMaterialEmbedListeners into HtmlMaterialController
** Added listByWorkspaceMaterial method into WorkspaceMaterialFieldDAO
** Added method for listing workspace material fields into
WorkspaceMaterialFieldController
** Added method for creating workspace material fields into
WorkspaceMaterialFieldController
** Refactored WorkspcaeHtmlMaterialBackingBean to use
WorkspaceMaterialFieldAnswerPersistenceHandlers for field answer
persistence
** Added support for persisting workspace material text fields