Added physics engine-module and example

- Added new physics engine-module with four new data types: Physics,
Transform, Rigidbody and Collider. This library contains functions to
apply physics calculations to a position vector calculating collisions
automatically.

- Fixed some writing mistakes of lighting module.

1 files changed, 0 insertions, 0 deletions

diff --git a/examples/physics_basic_rigidbody.png b/examples/physics_basic_rigidbody.png
new file mode 100644
index 00000000..3d691637
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+++ b/examples/physics_basic_rigidbody.png