- removed newlines for prettier rendering
- better wording around double negation
- clarified where custom applications specify their own schemas
- removed all references to endiannes except in Notations and
  Definitions section, and in code
- don't use l as a variable because it often looks like 1 or I
- add section on how to use lists for key-value lists
- add examples and more explanations around features they use

…ding