Fix log output to minimize impact when not used
Merge branch 'master' of github.com:yoshitomo0912/blueprints-ramcloud-graph into yoshi-master

Conflicts:
	src/main/java/com/tinkerpop/blueprints/impls/ramcloud/RamCloudIndex.java
	src/main/java/com/tinkerpop/blueprints/impls/ramcloud/RamCloudVertex.java
Fix messages
Merge pull request #14 from y-higuchi/yoshi-master

Fix log output to minimize impact when not used