Add Color Perception Notes

[gulpinhenry]

Content

• Created Color Perception engineering note (converting image subpixel intensities to LMS cone response)
• Created Color Perception course note to explain human color perception and its relation to display technologies

Testing

• Tested MKDocs locally
• Little/No Risk for merge

[kaanaksit]

Thank you, Henry, for this update. I noticed that this pull request has some conflicts to be resolved. In order to review and merge, it has to be resolved first. I appreciate it if you could help me resolve the conflict and update the pull request accordingly. Great thanks!