Explosions and TNT block and entity

[keyboard]

Yeah, I was going to rewrite to use chunk (maybe cBlockArea) and to actually create rays of explosions that attempts to destroy the blocks depending on their resistance. It was kind of a big task to make it on the first try (I am also working on the physics for entities which is another big task hehe ), so that's why i decided just to implement it as a simple cube as first step