Version 1.1.0

1.1.0 - 2018-03-23

* Warn about maec content
* fix win-registry-key issue
* Bump to latest stixmarx.
* Drop support for Python 3.3
* Clear cybox caches once per elevate call
* Don't validate on no policy
* Update Tox configuration and and fix logging problem
* Added python-stix2 as a dependency
* Pattern expression classes
* Support silent option in validator
* Add support for Python 3.6
* Handle Constants and ObjectPaths
* added demorgan's rule stuff to handle boolean expression special case for ranges
* fix __str__ methods
* Clean up global variables, and made sure they were all reinitialized for each new file.