Incremental check-in to delegate secret generation and checking
Incremental checkin. Basic feature working.
Merge branch 'issue-178-stateless-account-linking' of github.com:mozilla/browserid-bigtent into issue-178-stateless-account-linking

Conflicts:
	server/lib/account_linking.js
	server/routes.js
	server/views/id_mismatch.ejs