Fixes Issue #5 - when a query has no return value a HTTP 204 should be returned rather than an exception that ultimately is a 500 error
Issue #5 - moved the transaction success to occur before returning noContent
Issue #5 and #6 Updated readme to reflect the possible 204 responses
Merge branch 'master' into 1.9

Conflicts:
	src/test/java/org/neo4j/cypher_rs/CypherRsPostTest.java
Fixed unit test for 1.9