Atmospheric Drag V1.2.1

Fixes:
Fixed crash implemented in V1.2 when placing a new grid

Atmospheric Drag V1.2

Features:
-Drag now interacts with the vehicle from three different vectors: What this means is that if you are flying straight and you tilt the front of the vehicle up then you will get lift as well as backward drag from that bottom surface. If you are falling from the sky straight down and you tilt your ship to the left then your ship will start moving to the left as well as down (think falling leaf)

Fixes:
-Wheels no longer provide incorrect drag
-Wheels no longer add torque on the main grid

Efficiency Improvements:
-Grids that are 1 block or less are not included in the atmospheric drag calculations.
-The surface area algorithm no longer runs on ships unless they are in motion.

Atmospheric Drag V1.1

-Realistic surface area computation for drag: I implemented surface area using raycasting collisions for the 6 grid directions. I then chose the 3 directions that were facing the linear velocity and used vectors and dot products to have each side contribute it's share to the drag.

Atmospheric Drag V1.0

-Adds basic drag in the atmosphere of planets