This is a quite regular feature request on the Drupal website (see for example this article), but there hasn't been provided a full answer anywhere and the answers only cover Drupal 6.
Instead of rating content with whole stars, I'd like my users to be able to vote with half stars (0.5, 1, 1.5, 2, etc.). On my website, voting on nodes happens via comments.
How can I achieve this? Which CSS and/or PHP changes do I eventually have to make to the Fivestar module?