Cleanup and formatting
Update to "Allocate memory for the collision shapes inside the physics engine"

https://github.com/DanielChappuis/reactphysics3d/commit/f692f7ef126fd163
f0ad37b3a239138b04fd543b
Update to "Start to implement the joints"

https://github.com/DanielChappuis/reactphysics3d/commit/471e4f7afcf1b4e0
b5de2b3fecd02e24ab21f72b
Update to "Continue the implementation of the constraint solver"

https://github.com/DanielChappuis/reactphysics3d/commit/2b2143d41e1bd547
2c220ce5bf3d180902e041a6
Update to "Modify the contact solver so that its main loop is outside the solver"

https://github.com/DanielChappuis/reactphysics3d/commit/fdda0b26a92c603e
8b52b6b9aa4f94fddf3b29d7
Update to "Implement the Ball-And-Socket joint"

https://github.com/DanielChappuis/reactphysics3d/commit/c4eee4fb1f42f7d5
1e4f952ae838539dc0dbc8a7
Update to "Add comments in the dynamics world code"

https://github.com/DanielChappuis/reactphysics3d/commit/0071ed16a8d3f89b
efe1309be491512d215e3506
Update to "Fix two issues"

https://github.com/DanielChappuis/reactphysics3d/commit/af2fcaeb8213c284
8b95f0943a2b4ad14af89121
Update to "Modifications in the BallAndSocketJoint to make it work"

https://github.com/DanielChappuis/reactphysics3d/commit/da78e5d79a547b92
9341a6fedfa1b0d9d7dd924c
Update to "Start working on the slider joint"

https://github.com/DanielChappuis/reactphysics3d/commit/b87f981827807581
a6142cb05e3b8cc3aaa3258a
Update to "Add Vector2 and Matrix2x3 classes"

https://github.com/DanielChappuis/reactphysics3d/commit/7a2c2bdbd57db1de
5e3db876b2675fff41d85980#diff-8
Update to "continue working on the slider joint"

https://github.com/DanielChappuis/reactphysics3d/commit/0f17bd1b0b417c66
de03da4557107a14ab0c171c
Update to "Fix issues in the BallAndSocketJoint and SliderJoint"

https://github.com/DanielChappuis/reactphysics3d/commit/78abbaac729038a9
1cb5e0994a3c23e84b0acd47
Update to "Start working of the SliderJoint limits"

https://github.com/DanielChappuis/reactphysics3d/commit/c7aa6e7e0e7837d1
75d9fa40b618856b89c07225
Update to "Implement the upper limit for the slider joint"

https://github.com/DanielChappuis/reactphysics3d/commit/61562b3560b8795f
37e1cef488432d3a4442c37c
Update to "Finish the implementation of the slider joint"

https://github.com/DanielChappuis/reactphysics3d/commit/9c0844cf1b8ec612
ae7cf60dc4cc9ca0b7fd1ecf
Update to "Finish the implementation of the Hinge joint and some others modifications"

https://github.com/DanielChappuis/reactphysics3d/commit/c4d6206ee240c69f
d0991013e43381c916ab1648
Update to "Add the fixed joint"

https://github.com/DanielChappuis/reactphysics3d/commit/1c0726d9d68e5c5b
272f7db825481043a9f22511
Update to "Implement the non-linear-gauss-seidel position error correction"

https://github.com/DanielChappuis/reactphysics3d/commit/ce0078c2a96a38bb
41a523560edefa24e92a550f
Fix some porting mistakes