Alter the KoInlineObjectFactory to have templates instead of assuming there will be one factory per variable-type. This allows one variable-factory to supply multiple variable types. For example, a date-variable can supply 'fixed' dates and 'last printed' dates etc.

Start work on a date variable plugin. I still have some troubles getting cmake to actually compile more then one file in there before it starts linking. I must be doing something wrong, but I fail to see what it is.