V0.12: New game mechanics

V0.12a

- Bugfix: Stop handwashing when walking away from sink
- Bugfix: Credit replay button did not work
- several audio adjustments
- Credit screen with scrolling text
- Glove: open door w/o being contaminated
- apple leve to explain gate
- items which cannot be washed: baguette
- supermarket can leave door open
- alternative action key: return