Removed "unreleased" section of Changelog

Changed "unreleased" to "3.6"

don't try to render a null published_date

Merge remote-tracking branch 'origin/flapjack' into 3.5

Warn about Vagrant not working

See cfpb#2217 (diff) for more info

Warn about Vagrant not working

See cfpb#2217 (diff) for more info

Pin version of html5lib because of breaking change in latest release

updating changelog

Merge pull request cfpb#2218 from cfpb/no-pdfs-for-invalid-zipcodes

Hotfix: stop trying to process invalid URL's with PDFReactor

Hotfix published pages