Update to "Remove the margin gap for the BoxShape and make possible to choose the collision margin when creating a collision shape"

https://github.com/DanielChappuis/reactphysics3d/commit/a3ca3598d5b77a87
d6cee8b340b9611d3cb9cb5b
Update to "Add the Material class to store the material properties of a rigid body"

https://github.com/DanielChappuis/reactphysics3d/commit/e081661d8c10dc1d
0714fc930107b4ae20a69eac