Moved selection controls to top of the web page
Added locations of EU and AP areas

The locations of IP addresses include EU (Europe) and AP (Asia-Pacific).
These are not individual countries, so not present as ISO 3166 code. To
position them on the map these codes have been added with a location
roughly near the middle of their area.
Update map when changing unit, improved map colors

The map representation now changes with the selected unit, and no longer
always shows hits.
The coloring of the map is changed from blue to red hues. The meaning is
reversed, lighter colors indicate higher numbers. This is done mainly
for the bubble representation. Smaller bubbles are better visible with a
darker color.