Quaternions, Cameras and Maths in general

[Lachee]

Quaternions need to be added to the project. I have been struggling for some time behind the maths now and I cannot seem to get it right.

The general gist of what needs to be done:
Quaternions need to be implemented and confirmed working
Matrix need to work with Quaternions
A basic camera script that can show off the Quaternions, with function such as LookAt.

Ideally, quaternions should follow the same paradigms already established with Vectors, with maths and normalize. Additional functions to include are:

• Angle - Angle between two rotations
• Euler - Rotation in degrees
• FromToRotation - Rotation from a direction, to another direction
• Inverse - inverse of the rotation
• Lerp - Interpolation between quaternions
• Slerp - Spherical interpolation
• LookRotation - Rotation that points forward at a particular point in space.