Snackbar

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- fixed grill maxlevel
- extended burger level to 3
- new ingredients: 2 (pattyveggy, bbqhoneysauce)
- new researchable tech: 6 (burger +2, bbqsauce +1, coffee +3)
- new items: 3 (espresso, latte, americano)
- new feature: Accounting (researchable, 3 levels, view graphs about stats)
- finetuning of people and weather correlation
- in-app purchase (disable ads) disabled for now (sorry to complicated for me currently)