Updated utilities page to refer to STIX v1.1.1. Updated utility descriptions and links to align with current capabilities and locations.
Convert concepts page to wells
Merge pull request #91 from STIXProject/utilities_update

Updated Utilities page
Merge branch 'master' into site_reorg

Conflicts:
	documentation/utilities/index.md
Add additional tags to idioms
Use a static navbar rather than a fixed one.

Previously, links like /documentation/idioms/#incident would cause the target
header to be hidden behind the navbar.
Remove unused 'active' template variable
Don't copy Rakefile to _site directory
Fix typo in link
Redesign data model overview page to alternate float orientation
Add Documentation well describing and linking to python-STIX's readthedocs page
Make Whitepaper nav link open in new tab
Quick link fixes
Touch up getting in touch
Center align contact text
Restyle security considerations page
Restructure idiom docs layout using collapsible panel groups
Use consistent panel color. Detach from accordion grouping, so items can be expanded/collapsed independently. Expand by default.
Redesign data model overview page to use left-aligned, striped format
Remove 'get in touch' header