Bug fix: update camera resolution to match calibration file
Bug fix: update camera resolution to match calibration file

Previously, the resolution of the webcam was fixed at 320x240. However, the default resolution for the usb_cam package is 640x480, which is also the resolution that the webcam was calibrated for. Thus, the resolution of the usb_cam node is now set to 640x480.

BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS,BCLab-UNM/SwarmBaseCode-ROS