Lesson 11 cleanup
Lesson 12 cleanup
fix header levels
Lesson 13 cleanup
Lesson 14 cleanup
Remove HTTP lesson for now since its empty
Lesson 16 cleanup
Adjust TOC ordering

Makes no sense to put important content after all the lessons. Lets move them to
the top and put the homework lesson after the lesson.
Clean up mission page
This was replaced by the actual lesson 2 content, removing
Cleanup vagrant docs
Remove deprecated content
Lesson 00 cleanup
Lesson 1 cleanup