add week5 and mid-term materials
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2014
week 6 materials
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2014
week 7
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2014
week 8 materials
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2014
week 9 materials
ignore documentation
week 9 slides
Merge branch 'master' of github.com:UWE-Ruby/RubyFall2014