Factories refactor

[Hachitus]

I think the hexa factory (and factories in general) should not be in the library (flatworld.factories.hexaFactory), but rather just separate part. The games can hold any kind of data structure and we can not use this specific factory, but only in few handful of cases.

Factories also create the render-tree and basically they do that mostly apart from flatworld engine. So we could have some more general factory that can handle the iteration and would get some basic configurations, but many of the functionalities would be outside of this basic factory.