Addresses issue #15

[bdorney]

Description

Addresses issue #15

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Motivation and Context

See #15.

How Has This Been Tested?

% source scripts/setup_CMS_GEM.sh 
FRAMEWORK_BASE /path/to/CMS_GEM_Analysis_Framework
/cvmfs/sft.cern.ch/lcg/app/releases/ROOT/6.06.06/x86_64-slc6-gcc48-opt/root/bin/root
python2.7=/cvmfs/sft.cern.ch/lcg/external/Python/2.7.4/x86_64-slc6-gcc48-opt/bin/python2.7
pip2.7=/path/to/CMS_GEM_Analysis_Framework/python/pip/bin/pip
% which root
/cvmfs/sft.cern.ch/lcg/app/releases/ROOT/6.06.06/x86_64-slc6-gcc48-opt/root/bin/root
% python --version
Python 2.7.4
% g++ --version
g++ (GCC) 4.8.4
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Screenshots (if appropriate):

Checklist:

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.