use rqt on hrpsys_dashboard

https://github.com/start-jsk/rtmros_common/issues/315

rxtools is omitted and we need to use rqt

new rqt version supports:
* diagnostics
* rosout
* log download
* support run/stop rtcd. the command should be provided via `hrpsys_rtcd_start_command` and `hrpsys_rtcd_stop_command` parameters.
* support run/stop hrpsys_ros_bridge. the command should be provided via `hrpsys_ros_bridge_start_command` and `hrpsys_ros_bridge_stop_command`.
* support servo on/off. as default, it calls power, goactual and servo ros bridge services. And, you can also specify the commands to start/stop servoing via `hrpsys_servo_start_command` and `hrpsys_servo_stop_command`.

![screenshot from 2014-04-18 20 34 38](https://cloud.githubusercontent.com/assets/40454/2741545/794677fc-c6ed-11e3-8f1d-3b841e79181c.png)