Formatting. Hostname in title. Time in status.

- app.js
  - ran jshint, followed most of its advice.  Also js-beautify.
  - Added the hostname in the page title
  - Added a datestamp to the connection status message, e.g. "Connection
    status: got a message at May 28, 2014 1:14:29 PM"
  - Uncommented the Ctrl-Enter alias for Cmd-Enter
- index.html
  - ran js-beautify (in html mode, duh)
  - Added the hostname to the page title
  - Added a datestamp to the connection status message, e.g. "Connection
    status: got a message at May 28, 2014 1:14:29 PM"
- server.go
  - ran gofmt
  - added the api/v1/hostname call
  - commented the printing of all program output