merge of 2.13 branch back to trunk, and rollback of WorkflowService related changes

merging 2.9 branch changes into the trunk

CYKLO-644: configuration option add_document_visual_editor added, when false (default) plain text -> html conversion routine is used (tag removal, newline to paragraph translation)

CYKLO-643: Save attachments descriptions changes action fixed.

CYKLO-636: Include document tumbnail to document propose attachment file resources. Save and Update proposal action modified.

CYKLO-639: HTMLService.removeEmptyParas invocation added to isValid(HTMLService) (invoked from actions) and cleanupContent(HTMLService) (invoked from views)

CYKLO-625: disabled HTML stripping and newline to paragraph translation for newly proposed documents (visual editor support)

CYKLO-620: setAttachments method in ProposedDocumentData class modified to set only FileResoureces. getAttachmentDescription method modified to prevent from indexOutOfRange exception.

CYKLO-630: fromNode method modified to set only FileResources to proposedDocumentData.attachments. SaveProposedChanges action at save attachments section changed.

CYKLO-613: an overhaul of text handling that will hopefully fix those problems for good. Basically, we HTML-entity encode the text on the way to the browser and the proposal XML document, we HTML-entity decode the text on the way from the browser and proposal document, and we strip HTML tags on the way from the browser and from general (administrator - edited) document. Content is treated differently: basically unchanged, except from toNode method used when submitting new documents.

CYKLO-613: refactoring HTML striping into separate methods

CYKLO-613: changed attachment id handing in fromParmeters method for consistency

CYKLO-613: introducing quot / unqot methods into fromParameters / toTemplatingContext

CYKLO-614: Save action method for ReviewProposedChanges modified to allow accept, reject and save option.

CYKLO-611: make cleanupContent logic generally available as a static method

CYKLO-609: fold successive newlines into one

CYKLO-601: Field editorial note added to proposed document data component.

CYKLO-538: Attachment description added to attachment section on ReviewProposedChanges screen. Null reference attachments list bug fixed.

CYKLO-538: prevent NPE when document contains no content

CYKLO-595: clean up document content before passing on to the simplified editor. Don't frustrate the user with markup they are unable to edit.

CYKLO-538: don't call enc() multiple times. This should prevent strange behaviour with &quot; and similar showing up in document attributes. This also prevents striping <p> tags generated for newline-terminated blocks of text on original proposed content.

CYKLO-593: store content attribute in proposa wrapped in CDATA node, it contains sanitized XHTML now.

CYKLO-593: added HTML validation and cleanup to PDD.isValid() method, adjusted API

CYKLO-593: removed unused parameter

CYKLO-570: track the location of the node where proposal of changes was submitted. this is needed to look up component configuration in the administrative screens

CYKLO-570: provide default value for attachmentDirId. It will not be used unless attachmentsEnabled == true

CYKLO-570: NPE protection

CYKLO-570: backend for requesting document removal

CYKLO-570: expose attachments List for the benefit of review screen / action

CYKLO-538: Defined selectedCategories in fromProposal method.