add week 6 materials
some more week 6 materials
small change to slides
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2013
Add slides as PDFs
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2013
week 7 materials
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2013
Update README.md

update when the mid-term is due
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2013
add week 7 material