vlm
SET DEBUG=* to display all debug messages
c denotes real client s denotes mockup server
use node vlm.js c vlm-localhost.js and node vlm.js s vlm-localhost.js
to test conv
use node conv.js c conv-localhost.js and node conv.js s conv-localhost.js
to test ptl
use node ptl.js c ptl-localhost.js and node ptl.js s ptl-localhost.js
to test ptl