Fixed integrator classes and functions
Fixed incorrect decorator on method
Fixed operations on Transforms
New function: perspective()
Fixed missing import
Renamed variable
Fixed incorrect class name
New classes: Sample, Sampler
New class: Film
New classes: Camera, ProjectiveCamera
New class: PerspectiveCamera
Added new operator: Point / float
New class: Task
Fixed init of the TransformedPrimitive
Fixed sampler_renderer functions
Renamed parameters of Scene.__init__
New class: ImageFilm
Sample scene to test completion of the renderer's basic implementation.