initial stix work
addded title, description + some cleanups
TAXII transport for STIX messages
jinja2 template for stix xml
the actual template
added destination socket to stix package
fail hard if log worker goes down
test cases for TAXII and STIX
removed old comment
Merge pull request #112 from glastopf/stix

Basic work for STIX/TAXII integration.
Closing #106