Request for review of question types and form logic docs

@adammichaelwood recently cleaned up and reorganized the Question Types and Form Logic sections of the docs and we'd love your feedback on if they are clear and comprehensive.

If you find problems, please file an issue or just comment here with your feedback. And if you are looking for extra karma, please submit a pull request on the docs to correct the issue you find.

Let's make the docs better together!