yesod-auth: send json responses
Merge branch 'master' into auth-json-2

Conflicts:
	yesod-auth/Yesod/Auth.hs
	yesod-auth/Yesod/Auth/Email.hs
	yesod-auth/yesod-auth.cabal
Merge pull request #700 from yesodweb/auth-json-2

Auth json 2
Remove HashDB
hspec 1.8.4 hspec/hspec#165
Doh!
Merge remote-tracking branch 'origin/master' into persistent2-simpler-dispatch

Conflicts:
	yesod-auth/Yesod/Auth/HashDB.hs