Complete camera nodes

[adamkahl]

This should eliminate the need to launch core nodes/camera streams via SSH

[adamkahl]

Todo:

• Run build.sh and run.sh on startup
• Use v4l2-ctl --list-devices to identify camera devices
• Identify surface IP address (we will most likely just use a static IP)
• Update cameras node to use ffmpeg command: ffmpeg -f v4l2 --fflags nobuffer -i /dev/video## -vcodec copy -g 10 -f rtsp rtsp://localhost:8554/camera_#

[adamkahl]

Update: All steps listed above are complete. Just need to clean up the code a bit and then we can submit a pull request.