Merge branch 'hotfix-0.9.2.1' into develop
bugfix: session.currentuser does now work for preexisting sessions, too, again
workaround for race condition with deletion of pages on the server
added languagecontexts to some parts where it was missing
Check for page existence first on DeleteIrrevocably
ExecuteRQL now returns an empty XmlDocument, if the server reply was empty, instead of throwing an exception
added protected c'tors to cachedlist and subclasses to allow late setting of the retrieval function in subclasses
added Categories and Keywords classes to have category/keyword management in one place each
added workflow preassignment
replaced templatevariantlist with icachedlist
changed user attribute data types to real types instead of strings
fixed attributes of workflow
allow the deletion of workflows
added missing classes
moved AbstractWorkflowPreassignable.cs
moved abstractworkflowpreassignable ...
allow null to be passed to setpreassignedkeywords
changed version to 0.9.3.0
Merge branch 'develop'