Also adding form handler class that I forgot to commit earlier.

/i2ptunnelmanager redirects to /i2ptunnel/ if the browser doesn't support IFrames.

Now, Ajax will be used first, and will fall back to IFrame if JS is disabled,
and a separate page if on a text or mobile browser.
Also, /home and /console (and everywhere) now all have the same summary bar
content, which currently defaults to the original full listing.

The initial attempt using mapping of strings to methods is shorter and neater,
but also doesn't work so is commented out.

              don't use system properties for status

    - Summary bar tweaks
    - Config nav CSS tabs
    - CSS cleanups from last checkin

  * Netdb: Speed up collection of all the floodfill peers by using
           PeerManager.getPeersByCapability()
  * PeerManager: Capability cleanups