runTimePostProcessing FO camera update

Removed the camera 'mode'

• The (old) static camera was only appropriate when parallel projection was inactive, and the view was centred at (0 0 0)
• Camera input now always requires 'position' and 'focalPoint'
• Clip box is now optional. Note that this is applied after the camera set-up and so will override the camera position
• View angle is only appropriate when not using parallel projection
• Zoom now required, applied after all other operations
  • 1 = do nothing, >1 = zoom in, <1 = zoom out

Example input: