hours gets active again

after a long time the work on hours will continue again.
the next features to be implemented are:

- each database will get a note associated with it
- the overtime will be (optionally) calculated on a 'per date' basis (not only 'per entry').
- while importing records from DateBk categories will be assigned the same category in hours (if available)
- cut/copy/paste of records between hours databases

and of course other features, too.

pete.