Update README.
Fix snapshot() and regen() of StdGraphView. Support more dot images.
Replace mkdirs with mkdir.
Add USE_SVG conditional flag to ImageCache.
Add files generated by SWIG.
Update README.
Update README.
Update README.
Add zoomPan(dx, dy).
Add note for zoomPan().
V1.1.16: Add zoomPan and support more dot images.
Add USE_SVG conditional flag to ImageCache.
Fix snapshot() and regen() of StdGraphView.
Replace mkdirs with mkdir.