message: Adding comments for matrix camera
diff: namespace visionaray
  {
  +//-------------------------------------------------------------------------------------------------
  +// Camera class that internally stores view and projection matrices
  +//
  +// When this camera generates primary rays, it will do so by starting in OpenGL-like NDC,
  +// with rays that are perpendicular to the image plane, and transforms them to world
  +// coordinates using the inverse of the internal matrices
  +//
  +
  class matrix_camera
  {
  public:
  