Set version to 0.3.
Fixes null pointer exception when running integration test.
Upgrade to simple-jpa 0.8.
Use injenction provided by simple-jpa 0.8 for repositories.
Fixes can't login.
Remove button to display bonus points from Customer screen.
Refactor event consumers as Griffon's services.
Update event handler code for repository injection.
Refactor repositories into simple-jpa's repository artifact.
Refactor services into Griffon's service artifact.
Rename the remains of `Container` into `SwingHelper`.
Refactor to use simple-jpa's login dialog.
Change defaul template.
Add navigation from products to their supplier.
Add domain classes for purchase and sales returns.
Upgrade templates.
Add MVC for sales return.
Redesign domain classes for sales or purchase returns.
Allow delivery for claimed products of sales returns.
Add MVC for purchase return.