Implementation of MultiVertexQuery and adjacency constraint in VertexQuery
fixed bugs in wrappers (did not unwrap transactional handle)
Merge branch 'master' into multiquery

Conflicts:
	titan-core/src/main/java/com/thinkaurelius/titan/graphdb/vertices/CacheVertex.java
fix ordering of the results in multiget_slice query for astyanax/thrift
Fixes #269
Merge branch 'multiquery'