Begginer Incongruencies

There's no better time to make a typo in a header then when you publish it for people to open and read! The first typo people found was that everywhere in the text, the word "beginner" was typo'd as "begginer". It didn't appear that often in the text itself, but it was a part of a section title, meaning that it spread from there on, on every page. Additionally, some small incongruencies were found and fixed.