new version of model-registry made
test data added
aggregation,artifact,datatype,enumeration, compositekeys implemented
comments
model updated
updated
notes...
conceptual model updated
model update
bug fixed in xml
textuml xmi file added
Merge remote-tracking branch 'origin/model-reg' into model-reg-2.1

Conflicts:
	molgenis-model-registry/src/main/resources/templates/metadata-macros.ftl