adding equals methods and testing importer with marshaller and standard rest controller
Merge branch 'develop' of github.com:MetadataRegistry/ModelCataloguePlugin into develop

Conflicts:
	ModelCatalogueCorePlugin/grails-app/domain/uk/co/mc/core/ConceptualDomain.groovy
	ModelCatalogueCorePluginTestApp/grails-app/services/uk/co/brc/modelcatalogue/ImportService.groovy
Added fixtures plugin - half way through reworking integration tests and adding equals methods to classes
Merge branch 'develop' of github.com:MetadataRegistry/ModelCataloguePlugin into develop