This reverts commit f619e13d.

Added UUIDs for each imported item.
Supported groups.

Import ubz works bad with groups.

Corrected imported text position.
Strokes for lines and polygons has the same color as fill color.

Fixed svg:a section. Now cff fully compatible with online validator http://validator.imsglobal.org/iwb/index.jsp?validate=package

UBCffAdaptor adapted to current validator to have less errors (http://validator.imsglobal.org/iwb/index.jsp?validate=package)

If warnings was appeared - dialog with warnings details appeared. Each warning is a separate QTextEdit.

That mechanism is general for UBExportAdaptor and can be simple implemented and used in any import or export adaptor.

Transformations adjusted to iwb specification.