Removed redudant null-check from `Camera` constructor; added a comment about "corner-cases" in `Camera.Contains(ITrackableObject, bool)`; updated `2f` to `2.0f` for consistency.
Removed redudant null-check from `Camera` constructor; added a comment about "corner-cases" in `Camera.Contains(ITrackableObject, bool)`; updated `2f` to `2.0f` for consistency.

EBrown8534/Framework