Expertiza Final Project Submission

Since our commit history and contributors used our own private repo, and we had to fork again, copy all files, then create pull request, none of the commit history is propagated. 

But I tried the tests, and all works. 

Here are the 7 commands to run the seven test files we worked on:

bundle exec rake test:units TEST=test/unit/language_test.rb
bundle exec rake test:units TEST=test/unit/response_map_test.rb
bundle exec rake test:units TEST=test/unit/response_test.rb
bundle exec rake test:units TEST=test/unit/resubmission_time_test.rb
bundle exec rake test:units TEST=test/unit/deadline_right_test.rb
bundle exec rake test:units TEST=test/unit/due_date_test.rb
bundle exec rake test:units TEST=test/unit/late_policy_test.rb