Increase USB Camera Capture Rate

[flynn248]

The USB cameras are currently capturing at around 17 fps. This too slow and a more ideal speed would be 25 - 30 fps. Capturing a compressed image may help with this issue. Another method is to find a C++ ROS package that uses the USB camera. A potential on is listed here http://wiki.ros.org/usb_cam.
A potential issue of the above package is trying to use multiple USB cameras with the same package. It would need to be able to launch with different topic names else they will overlap and cause the previous one to shut down.