added planar graph visualization

bipgraph.py

images/0.png

images/0_matching.png

images/0_planar.png

images/1.png

images/10.png

images/10_matching.png

images/10_planar.png

images/11.png

images/11_matching.png

images/11_planar.png

images/1_matching.png

images/1_planar.png

images/2.png

images/2_matching.png

images/2_planar.png

images/3.png

images/3_matching.png

images/3_planar.png

images/4.png