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.

Addressbook Loader works (from previous commit). Todo: put name count
in list header.

Broken, addresses do not load into mAdapter after a tab change.

getRouterContext() returns null in onActivityCreated(), there is a race
condition to fix somewhere, use refresh action to load.

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

StatSummarizer and SummaryListener are based on the same-named classes from the
routerconsole. Data is stored in memory using an AndroidPlot SimpleXYSeries.
Only the last 30 points are currently stored.