[aerial_robot_model] add robot model plugin for general transformable robot#735

sugikazu75 wants to merge 2 commits intojsk-ros-pkg:masterjsk-ros-pkg/jsk_aerial_robot:masterfrom

sugikazu75:PR/model/transformable_robot_pluginsugikazu75/jsk_aerial_robot:PR/model/transformable_robot_pluginCopy head branch name to clipboard