Add DIO pin config for Aug 2014 version. Flexibly configurable DIO pin. Fix #113

This single commit consists of 2 parts (which is hard to be told. My bad):

- Add new DIO pin config that's introduced by manufacturer in Aug 2014 (see #113).
- Enable to set new DIO config more easily.

Unit test should better be added (ticketed https://github.com/start-jsk/rtmros_hironx/issues/272).