Tasks: - [ ] [Create a node that reads the charging dock and goes to it.](https://github.com/khancyr/isr-uc-ros-pkg/blob/master/stacks/roomba_robot/trunk/roomba_500_series/src/GoDock/GoDock.cpp) - [ ] Simulate the charging dock in Gazebo: create the model and the plugin for charging the battery. 
