Added a new method to convert vertical field of view into horizontal file of view
Added classes and materials for CSE 168s first project
Moved the reflection calculation from ReflectiveMaterial to Material as a helper method
Added a loader object for cse168p1
Added a material for Dielectric materials, and included a refractive index parameter in RayData
Added a reflect() helper method for specular reflection rays
Re-added attenuation equations to point light (after disabling for a test)