provides basic structure of organization
add unit tests for PropertyDefinition{,Entry}, copied from integration tests
'Cause mockDomain() doesn't add "addTo" dynamic methods to domain classes, add TestUtils#addAddTos() utility methods.
Merge branch 'feature/property' into feature/organization
add introductory unit tests for awe9.property classes
Merge branch 'feature/organization' into develop
upgrade to grails 2.3.1