First version: show all open bills
Test
openBills test working when run separate
Fixed test
Merge remote-tracking branch 'origin/technical/fixunittests' into
develop

Conflicts [solved]:
	oscr/oscr-business/src/test/java/de/bstreit/java/oscr/business/bill/BillTestFactory.java
	oscr/oscr-gui-swing/src/main/java/de/bstreit/java/oscr/gui/swing/cashregister/ui/factories/ButtonPanelFactory.java
Improved staff consumption addin

* can calculate totals (according to current German laws)
* can return management consumption now
Reduced visibility to package
Pivot stats
Better solution for property files

TEMPlATES are now in oscr-business, as they are now used as defaults if
keys are missing. Avoids that the software does not start after an
update when the properties were not adapted.
Temporarily ignoring test
More Views
Tuned views
One more
More info in management consumption
Now showing number of open bills on open bills button