bump internal version to 2.3.1

bump version to 2.2.1

Remove unnecessary capitalisation in README

Merge pull request sonic-pi-net#327 from jweather/win23

updated installer for Windows

move time machine from sorcerer to wizard

no longer dev! 2.1.1 here we come...

add link to Sonic Dreams video

Add GitHub to community page

unify on Block-level rather than block level