- Projector.dart
  - takes Camera.dart
  - creates canvas within a div
  - setPos will move div
  - setSize will change size of canvas
  - will draw the Grid.dart
  - over the grid it will draw the drawables of the cameras Paper.dart

- added Grid.dart
  - will draw a grid in the background as an overview

- main will create
  - one paper
  - two cameras
  - and two projectors

this will create two images viewer showing the same paper but with different canvas sizes and different camerapositions