Log Message:
Update ruby-msgpack to 1.0.2.

2016-10-17 version 1.0.2:

* Bump version up to release newer version to fix broken gem release for JRuby

2016-10-17 version 1.0.1:

* Fix a bug to crash at packer when ext type is registered for superclass of \ 
packed object
* Fix JRuby implementation about inconsistent API of Unpacker constructor