Don't copy logback config because it breaks things
Add version and format
Move FixtureLoader and friends to main package (because it's generally useful.)
Add a module containing an assembly. This builds all of the other
modules and creates a tar.gz containing the EHRI jars and their
non-Neo4j dependencies (such as Blueprints and Guava.)

The install script now copies the contents of this package into the
NEO4J_HOME/plugins/ehri folder.