- bumped java version dep to 0.2.5
 - use properties for version numbers
 - removed unneccesary closure
 - reorganized exports
 - added wrench dependency
 - standardized quotes
 - made graph / txn instance unique to each gremlin instance
 - made bindings unique to each gremlin instance
 - cleaned up GremlinJSPipeline constructor
 - made .V and .E synchronous pipeline operations
 - added async hasNext, next and toJSON
 - added g.wrap and GraphWrapper to make interface more obvious
 - added g.query and QueryWrapper
 - made main export a function taking in options to configure Java runtime
 - made except / retain check against the actual Collection interface
 - removed unnecesary helper methods from GremlinJSPipeline
Merge pull request #24 from inolen/master

Async support