Problem Description
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Start building a small Casino app. We’re not looking for a complete app, we’re not even looking for a front end. Rather, we’d like to see how you approach the problem, implement the classes etc.

Main entities:
* Customers who have a certain amount to spend (can be random at first)
* Poker machines & drinks that have a certain cost (can also be random)

Customers can:
* Play poker machines with a chance of winning
* Buy drinks

The app should track (per customer):
* Total spent
* Total won
* Number of wins

Requirements
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* gem install bundler
* bundle install

To run tests
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* bundle exec rspec spec