Fixed hashlist import
Fixed hashlist import. Closes #22
Updated memory object for v2.0 and latest interfaces; closes #23
Fixed to_dict() method not returning the constructed dictionary. Closes #24
Removed string_list class member and all references; it has been moved to the (currently unsupported) ExtractedFeaturesType. Closes #25
Merge branch 'master' of github.com:CybOXProject/python-cybox