Merge pull request #64 from mikewesthad/master

Added source code for section 1
Added source code for all sections of the chapter and linked to the appropriate files at the end of each section of the chapter
Update chapter.md

edit
Tweaked an image to make it more readable
Wording fix to go with the figure tweak
Update chapter.md
Merge pull request #65 from ptterb/patch-1

Update Sound chapter.md
I think I finished writing.
editor pass through
a few more small tweaks
Merge pull request #67 from joshuajnoble/master

working through hardware, ways to go tho
Deleted newlines
Update chapter.md
updating author title
updated intro and some fixes
Merge branch 'master' of github.com:openframeworks/ofBook
Adding files for installation up 4evr mac os x
Add source of gitignore patterns.