message: fixed a small consistency issue in camera.h where a negation for getUp and getWorldUp was missing
diff: @@ -67,12 +67,12 @@ namespace ml {
  //! returns the (current) up direction
  vec3<FloatType> getUp() const {
  - return m_up;
  + return -m_up;
  }
  //! returns the work up direction (which is not necessarily the current up)
  vec3<FloatType> getWorldUp() const {
  - return m_worldUp;
  + return -m_worldUp;
  }
  FloatType getFoV() const {
  