This does nothing. getRouterContext() is always null when onActivityResult() is
called. Todo: implement callback that fires when the Router has bound and the
Fragment has an Activity.

The onPause() method in SettingsFragment was removed as it is unnecessary. The
parent SettingsActivity onPause() is sufficient to save config changes.

TODO: Refresh summary when a setting is changed.

The methods in TunnelConfig and TunnelUtil are taken almost verbatim from
IndexBean (modified to be static in TunnelUtil). The tunnel creation wizard
works now, and the new tunnel will start if auto start is enabled.

Most of the getters in TunnelEntry are almost verbatim from
net.i2p.i2ptunnel.web.IndexBean and net.i2p.i2ptunnel.web.EditBean