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
work from week4's class
Merge github.com:UWE-Ruby/RubyFall2013

Conflicts:
	week2/exercises/book.rb
	week2/exercises/book_spec.rb