Added sections on     6.2. Using Stable Releases

7. Why Are The Sources So Big?

    7.1. Size Comparison of Different Kernel Source Directories

8. Programming Religion
9. No C Library
10. Portability
11. Linux Internal API
12. Is It Free?
13. Advantages Of GPL Drivers
14. Advantages Of In-Tree Kernel Drivers
15. User Space Device Drivers

    15.1. Examples Of User Space Device Drivers
    15.2. The Good And The Bad Of User Space Device Drivers

Signed-off-by: Conrad Gomes <conrad.s.j.gomes@gmail.com>