Updating unit tests to use require_relative.  Need to update dependency to generate require_relative as expected.
Merge branch 'master' into require_relative
Added lines in mtl and todo comment

Updated generate.mtl with lines to account for associations and
attributes. Added todo comment for David since he wanted to work on the
implementation for removing blank lines and resolving require_relative
duplicates in the generated ruby code.
Merge pull request #61 from uiuc-cs428/require_relative

Require relative, closes #51