jsconsole v2.0.0

fix

• (jsconsole) code -> command.cmd

feature

• (jsconsole) add support of more then one connection
• (jsconsole) es2015-ify: drop support of node < 4.0.0
• (package) rm mollify
• (gitignore) add package-lock.json
• (package) console-io v4.0.0