Don't farnarkle about with the Repository class when testing ASModel--use a temporary class instead.
added a test for incomplete ISO 8601 dates, tidied tests a bit and removed unnecessary time expansion from validation
Merge branch 'master' of github.com:hudmol/archivesspace into 41440365-begin-before-end-date-fix
do some of the tests against 'inclusive' date types - equivalent to 'bulk'