Modified how to get keyindex/index object for multithreading
Merge branch 'master' of https://github.com/yoshitomo0912/blueprints-ramcloud-graph.git
Merge branch 'master' of github.com:yoshitomo0912/blueprints-ramcloud-graph into yoshi

Conflicts:
	src/main/java/com/tinkerpop/blueprints/impls/ramcloud/RamCloudElement.java
	src/main/java/com/tinkerpop/blueprints/impls/ramcloud/RamCloudGraph.java
	src/main/java/com/tinkerpop/blueprints/impls/ramcloud/RamCloudIndex.java
	src/main/java/com/tinkerpop/blueprints/impls/ramcloud/RamCloudVertex.java