Menu System

[José Juan Montes]

The MenuSystem is now minimally implemented, on top of the display system. To be honest, both are meant to be changed, but they are not really critical and they shouldn't really become a GUI system.

I will move on to the Settings system, and hopefully will be making small improvements to other systems.

The Tanks game needs a bit more work in the level loading. Once it's clear how levels will be loaded, it would be nice if someone is up to implement the AI of enemies.

Regards!

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Jose Juan Montes