First steps for loyalty card markers
Provided SQL for DB update
Loyalty cards feature works
Merge branch 'feature/bonuscard' into develop
Version 0.1.4

- Removed "size" from buttons
- Added connection pool to improve performance
- Added loyalty card feature
Preparing 0.1.5-SNAPSHOT
Improved button layout
Version 0.1.5

- Improved button layout
Prepared 0.1.6-SNAPSHOT
More user guidance

* Toggle buttons that only work if a product is selected are disabled
until at least one product is on the bill
* they are also disabled after the bill was paid
Merge branch 'develop' into release
Preparing new version
Preparing new snapshot
New snapshot prepared
First version: show all open bills
Test
Show and load open bills

* Start over with a new bill
* Show and load already open bills
Split bill view

* The control buttons are now on the upper right side, making the bill
window a little smaller
openBills test working when run separate
Fixed test