Tested on Bullet 2.83, Ubuntu 16.04.

1. Getting started
2. Theory
   1. Introduction
   2. Concepts
   3. Build
   4. Source code
   5. Users
   6. Benchmarks
3. Examples
   1. Gravity
   2. Gravity collision
   3. Which collision
4. Tools
   1. plot
5. Bibliography
6. TODO