Make it possible to have RETURN only queries in Cypher
Clean up instantiation of CypherParser
Rewrite Prettifier using parboiled
Merge branch 'boggle/2.0-peg-prettifier'
Merge branch 'systay/return-only'

Conflicts:
	community/cypher/src/test/scala/org/neo4j/cypher/ExecutionEngineTest.scala