the book object and tests we worked on in class during week3
Update with week 3 links
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2013
Update README.md

Moving some weeks around to accommodate our guest speaker!
Update resources
week 4 materials
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2013
Merge remote-tracking branch 'upstream/master'
Complete work 4 homework and exercises