website: cleanup links, add a few more highlight pages

website/content/computation_graph.md

website/content/finding_discrepencies.md

website/content/height_stabilization.md

website/content/images/computation_graph.png

website/content/images/discrepancies_bad.png

website/content/images/discrepancies_good.png

website/content/images/model_pitch_rate.png

website/content/model_pitch_rate.md

website/content/pages/about.md

website/themes/notmyidea/templates/base.html