Transition to use taxii-web-utils
Updated to use taxii_web_utils
Added a function for selecting headers
Changed to use taxii_web_utils
A bunch of changes to align with taxiiweb
Getting rid of ALL the old code
New code (from django-taxiiweb). This is the first
commit where the django-taxiiweb code is moved into
yeti.taxii_services
Some other adds
Merge branch 'web-utils'