Nodejs Web Admin peers editor

This update for Nodejs Web Admin allows easy editing, adding and deleting peers in CJDNS config file.

p.s. you should add path to your config file into "config" param inside ~/.cjdnsadmin file.
p.p.s. so, now other params in ~/.cjdnsadmin file are not required – admin host & port and password are read directly from CJDNS config.