Fixed an issue with image rotation help packages
Fixed an issue with image rotation help packages

- fixed an issue where OpenCv and Pillow were being used to rotate
  images with incompatible data types

ejeschke/ginga,ejeschke/ginga,pllim/ginga,naojsoft/ginga,pllim/ginga,pllim/ginga,naojsoft/ginga,naojsoft/ginga,ejeschke/ginga