Added 3 books

Added Apprenticeship Patterns to Professional Development.
Added How to Do What You Love & Earn What You're Worth as a Programmer to Professional Development.
Added Game Programming Patterns to Misc.

free-programming-books.md

@@ -319,6 +319,7 @@
 * [Object-Oriented Reengineering Patterns](http://win.ua.ac.be/~sdemey/) - Serge Demeyer, Stéphane Ducasse and Oscar Nierstrasz
 * [High-Performance Scientific Computing](http://bit.ly/hpc12) (class lectures and slides)
 * [Mother Tongues of Computer Languages](http://www.digibarn.com/collections/posters/tongues/) (PNG)
+* [Game Programming Patterns](http://gameprogrammingpatterns.com/) - Bob Nystrom
 
 ####Web Performance
 * [Book of Speed](http://www.bookofspeed.com/index.html) by Stoyan Stefanov
@@ -332,6 +333,8 @@
 ####Professional Development
 * [Don't Just Roll the Dice](http://download.red-gate.com/ebooks/DJRTD_eBook.pdf) (PDF) *(RedGate, By Neil Davidson)*
 * [Confessions of an IT Manager](http://download.red-gate.com/ebooks/DotNet/Confessions_IT_Manager.zip) *(RedGate, By Phil Factor)*
+* [Apprenticeship Patterns](http://chimera.labs.oreilly.com/books/1234000001813/index.html) - David H. Hoover and Adewale Oshineye
+* [How to Do What You Love & Earn What You’re Worth as a Programmer](https://leanpub.com/dowhatyoulove/read) - Reginald Braithwaite
 
 
 ###Ada