TinkerProperty.remove() no longer abstact and easier to reason about. GremlinOLAP now support non-graph object counters. Removed CounterMap in favor of a public static MapHelper.incr(). Provided a toString() to empty() Properties in StringHelper. Provide a toString() to non-empty Properties in StringHelper.
Merge branch 'master' of https://github.com/tinkerpop/tinkerpop3