Use forked wez-telnet at ggrossman/telnetjs to make option negotiation more flexible and expose constants.
Deleted baked-in copy of telnet.js
Added dependency on ggrossman/telnetjs to package.json
Add 'do' event handler to handle echo/SGA negotiation instead of baking it into telnet.js
Delete telnet protocol constants from cb_server.js; pull them from telnet.js
Merge pull request #14 from sourcedelica/ggrossman/fork_telnetjs

Use fork ggrossman/telnetjs instead of baking in modified telnet.js