importing have been implemented
- now the setting functions for meta rules needed
- and  then the usage of them for the library modification
adding menu items for new export/import library function
implementing library export/import
Merge branch 'master' into serialization
node creation/update and relations have been done
- meta update needed
- meta aspect?
now containment and attribute meta rules have been transported
bugfix in standalone (typo)
bugfix - persist still needs after every operation :(
first draft version of library serialization is complete...
getProperty assert removal (enhance number of persist operation
bugfix - moving of nodes was faulty
now project export - import use the new serialization format
Merge branch 'master' into serialization

Conflicts:
	client/js/client.js
	core/coretree.js
basic logging have been added
cleaning serialization menu items
adding 'add library' as a function
small typo bugfix
bugfix - now bases loaded during import and sets are imported...
potential fix for [#68]
Merge remote-tracking branch 'origin/feature/68' into serialization

Conflicts:
	client/js/Panels/ModelEditor/ModelEditorControl.DiagramDesignerWidgetEventHandlers.js

plus correcting import dialog
corrected wrong base pointer export/import