This is an OmniGraffle file which holds the source materials for the following images.
To update a chart:
- Make your modification!
- Select "File > Export"
- Select "Entire Document
- Choose: Scale: 100%
- Set Bitmap Resolution to 72 dpi (for web)
- Uncheck "Transparent Background"
- Select "images" directory
- Click "Export"
This should update all of the graphics in one go! Commit and pull-request.