Added the hw5 grading capability to lib/auto_grader_subprocess
Merge pull request #8 from saasbook/auto_grader_subprocess_fix

Added the hw5 grading capability and esacping to lib/auto_grader_subprocess
Simple cucumber based acceptance test for running the autograder with specs and submissions.
Added in hw3 and 4 to the specs and added hw5 to ag_sub_process
Change hw4grader to use bundle exec rake; formerly used plain rake;
Added fakeweb to gemfile, needed for grading Oracle of Bacon
merged conflict