Updated python-maec integration and unit tests.
+ Added check to see if 'maec' key in dictionary is a dict or
  string. This raises an error if it is a dict and python-maec
  is not installed.
+ Refactored unittests to validate behavior with xpaths.
+ Added 'maec>=4.1.0.8,<4.1.1.0' to test deps.
chmod -x