1.5.M02 (2011-10-10)
--------------------
o Relationships can now be optional
o Added new predicated for iterables: ALL/ANY/NONE/SINGLE
o Added path functions: NODES/RELATIONSHIPS/LENGTH
o Parameters for literals, index queries and node/relationship id
o Shortest path added
o Pattern matcher will, if possible, eliminate subgraphs early, by using the predicates from the WHERE clause
o Relationships can be bound now
o Added IS NULL for NULL checking
o Added new aggregate function - COLLECT

1.5.M01 (2011-08-31)
--------------------
o Added paths
o Changed r.TYPE to type(r)
o Variable length path supported

