Revert "Merge branch 'master' of https://github.com/iwut/TSP"

This reverts commit a0fbbf9692e2a9c0a465c9065152af23b2e9a874, reversing
changes made to 2de0c7e12443e983dd3f8e180e4e672823b588dd.
Revert "Working visualiser!"

This reverts commit 2de0c7e12443e983dd3f8e180e4e672823b588dd.