Redis now available as datastore for users for cb_server

- Added `package.json` for easy `npm install` installation
- If `USE_REDIS=T` in the env, cb_server will use Redis for its user records.
- bcrypt support for password one-way hashing
- `CB_PORT` environment variable can be set to change telnet port
- Set `HOMEREC=0` in cf/cbconfig so that user records are stored by Unix-CB in `recs` directory instead of individual Unix home directories, since cb_server doesn't create actual Unix accounts