Improved Falcon Heavy is coming

I am going to add a launch tower with water to put out any potential fires.

I will also add MarioG's Merlin 1Ds to the rocket. (Unless they are too powerfull)

Fixes: Upper stage now has 1 Merlin 1D instead of 2 old engines
SpaceX logo has a new X
SpaceX is shown on the side boosters

Thanks @MarioG and @Kell for helping me with the craft.