Dynamic Camera Reloading

[Xevion]

Boundary rules, Edge wrapping and possibly some other Boid related operations rely on the Camera's viewport size/position, but these values are only calculated once at the start of the application.
In order to support things like a resizable space, resolution resizing, or moving/zooming/following behavior, the camera must signal the application to recalculate these values when it changes.
This should be pretty simple and won't require any big new systems for now.