Version changes

What changed between two Phigros versions: new and removed songs, chart constant changes, and release notes. Signed in, you also see your RKS under each version's constants.

59 versions have song tables, from 3.4.0 to 4.0.1.2. Tables up to 3.19.5 come from phi-plugin; later ones are saved by the site's game data pipeline as each build comes out, so a version between two listed ones is folded into the next.