Fix #137.
Fix #125.
Fix #128.
Fix #123.
Fix #129.
Merge in colms' style guide.
Fix #134.
Fix #136.
Revise introduction.

Fix #135. Fix #130.
Fix #139.
Third draft of architecture chapter.
Tweak a few styles.
Illustrations for Spatial Partition and Architecture.
Tweak index a bit.
Update log.
small spelling changes
Correct does't -> doesn't in observer.markdown
Fix #146. Fix #148.
Fix typos in Architecture, Preformance and Games
Merge branch 'master' of git://github.com/laurenbee/game-programming-patterns into laurenbee-master

Conflicts:
	book/spatial-partition.markdown
	html/spatial-partition.html