Define the units and buildings in Scheme

[arthurmco]

I want to define units and buildings outside the game binary, so the development of them becomes easier.

The language Lua seems a good choice, because it is used in a large number of projects successfully

But first

• [x] Review the game object cloning.
  I think the game object code needs a review, specially the cloning and parameter storing part.
  • [ ] Review the object factory code for any problems
  • [ ] Wait for the object functions/classes stabilization I'd rather wait a little bit more than start rewriting the lua functions every week.

[arthurmco]

I will use Scheme now.

More beautiful than Lua, as fast as Lua depending on the scheme variant and not much harder to use