Join organization on email validation
Merge pull request #15 from RGM-Development/domain-autojoin

Join organization on email validation
Merge branch 'master' into demo-organization

Conflicts:
	server/src/main/java/nl/rgm/crewplan/backend/MailUserBackendProxy.java
	server/src/main/java/nl/rgm/crewplan/backend/UserBackendImpl.java
	server/src/main/java/nl/rgm/crewplan/server/database/DatabaseStructure.java