• Updated objects and other types to support Version 2.1 of the CybOX language.
• Add DomainName and Hostname objects.
• Added bindings for new AS, ArchiveFile, ARPCache, DomainName, Hostname, ImageFile, SMSMessage, WinHook objects
• Remove parseLiteral and exportLiteral functions from bindings.
• Remove member_data_items dictionaries from bindings.
• Standardize constructors of BaseObjectPropertyType and subclasses.
• Various typo corrections and bug fixes.
• This is just a summary of changes. For a full list of changes to support CybOX 2.1, see https://github.com/CybOXProject/python-cybox/issues?milestone=1