Initial commit of distance-related classes
Moved all ignored_ dictionaries into Distance class and added options_dict for specifying basic options
Added validity check for real_object inside of dereference_objects in Bundle()
Updated print_distances() to output to a file
Initial commit of distance calculation script
Updated .id usage on Malware Subjects to .id_ to account for new updates
Merge pull request #47 from MAECProject/distance

Distance calculation related code