bump to version 0.6.6 for release
bump to next dev version: 0.6.7-dev
fix: cpc year/week numbers being calculated incorrectly sometimes
agricultural years are fantastic
add changelog note about bugfix
bump to release version 0.6.7
bump to next dev version
fix: make cpc.drought url determination less flakey; fixes #85
add note about cpc
add note about the cpc.drought url fix to changelog
Merge branch 'master' of github.com:twdb/ulmo

Conflicts:
	CHANGES