Update 10s-denormalization.md.erb
Update 10s-denormalization.md.erb
Update 10-comments.md.erb
Update 10-comments.md.erb
Update 09s-creating-a-meteorite-package.md.erb
Update 09-errors.md.erb
Update 08s-allow-and-deny.md.erb
Merge pull request #9 from PSzu/master

Chapters 8 to 10s