compiles for the first time with dm-4.0.14
started upgrading in new branch, updated readme
updated readme
adapted service to run on current dm-4.1-SNAPSHOT 'master'.

changes:
- renamed occurences of CompositeValue to CompositeValueModel
- uri of "EduZEN Editors" workspace is now "de.workspaces.deepamehta"
- all migrations cleared and updated
- updated dependencies in pom.xml

to be tested:
- user roles and permissions through workspace assignment (collaborative editing)

Note: You must reset your DB.
removed some migration code. playing around w. mailings.
adapted plugin to new parent/child wording in dm-core 4.1
adapted to new view_config scheme in dm 4.1
1.0.0 Release. Adapted to run on DeepaMehta 4.1