Nearby entry in main menu.

Includes pull to refresh, titles, distance and thumbnails.

Distances update in real-time as you walk around.

Long-press item to open in Maps.

Direction arrows pointing to geo-coords of article.

Refactored thumb retrieval - no more stutter.

Nearby images now larger and round. Arrow moves around image.

Capitalized "Maps".

Now shows in meters or feet appropriately.

Change-Id: I866e95978d0e369a826fb7164c55cb954fcdc80c