add IndexHint to support not indexing a particular vertex
Merge remote-tracking branch 'origin/master' into index-hint

Conflicts:
	securegraph-test/src/main/java/org/securegraph/test/GraphTestBase.java
Merge pull request #23 from altamiracorp/index-hint

add IndexHint to support not indexing a particular vertex
Merge remote-tracking branch 'origin/master' into events

Conflicts:
	securegraph-accumulo/src/main/java/org/securegraph/accumulo/AccumuloGraph.java
	securegraph-test/src/main/java/org/securegraph/test/GraphTestBase.java