add C* global Vertex/Edge operatations

Conflicts:

	titan-cassandra/src/main/java/com/thinkaurelius/titan/diskstorage/cassandra/embedded/CassandraEmbeddedKeyColumnValueStore.java
	titan-cassandra/src/main/java/com/thinkaurelius/titan/diskstorage/cassandra/thrift/CassandraThriftStoreManager.java
add HBase support for global vertex/edge operations
resurect part of the scanTest
organized imports