CLOUDIFY-2393 added state_version field to NodeState
Merge pull request #28 from CloudifySource/feature/CLOUDIFY-2393-Storage-Impl-Phase-2

CLOUDIFY-2393 added state_version field to NodeState
CLOUDIFY-2423 removed riemann related unused code
CLOUDIFY-2423 removed riemann related unused code
CLOUDIFY-2423 removed riemann related unused code
CLOUDIFY-2423 removed riemann related unused code
Merge pull request #29 from CloudifySource/feature/CLOUDIFY-2423-remove-unused-riemann-code

CLOUDIFY-2423-remove-unused-riemann-code
add CloudifyRelatedNode.__str__(), use self._related.get() for node_id and node_properties