Updated tutorial: Handling character encodings in HTML and CSS

Content from this tutorial was distributed across several new and existing articles to reduce duplication and improve usability and maintainability. The completely rewritten tutorial provides a succinct summary of advice at the start, and then gathers together and organizes pointers to articles that, taken together, help you grasp the subject matter. The title was also changed.

Content derived from the previous version of the tutorial (ie. in the new articles) has been updated to include HTML5.

View the tutorial.