A few more bugs to fix but transactions occur!

To do list:
- Fix the transactions that got a null quantity,
- Improve the random and stupid strategy,
- Build a static class "Strategy" that will be a "strategy factory" (makes it customizable from UI)
- Build 2 smarter strategies and implement them,
- Improve the programMain so that several rounds can be played,
- Implement a market saver/serializer,