neo4j: support for cypher over jdbc

NB: optimisticLockingSpec fails
revert quoting of labels and reltypes
fix transactional behaviour: on execute a connections is opened or reused
deprecations
force JDK 1.7 compatibility inside grails-datastore-gorm-neo4j
support for Neo4j server: fix byte[] handling

neo4j-jdbc cannot distinct between String and byte[] when used remotely. As a workaround we do byte[]<->String conversion directly in GORM.
Adding test infrastracture for embedded, server and remote.
force commit when setting up indexes
refactor bean configuration for usage of Cypher via JDBC
workaround for closed connections

happens if e.g. a cypher statement is emitted during rendering gsp
[neo4j] plugin adoption for jdbc refactoring
fixing ignores
[neo4j] revert to JDK 1.6 compatibility
[neo4j] bumping version number
[neo4j] bumping version number to snapshot