add week4 materials
Merge branch 'master' of https://github.com/UWE-Ruby/RubyWinter2014
answer week4 1,2,4
week4 add worker.rb and Makefile
refactor Makefile
pass specs 1-3 with self.work
pass 4th test using local variables.
make result a method variable, and comment out 1st def
comment on method vs global variable
answer last question - now to add rakefile
add wrong Rakefile
make rakefile work. Sort of.