Clean up a few trace statements, etc.
Sum area of polygons where a council has not yet been formed.
Stop geoxml3 from automatically changing map zoom/position.
Don't draw polygon borders.

Otherwise, newer jurisdictions which were historically part of
older areas will still appear separate, even though we plan to
make their names, etc. vary depending on the point in time.
Skip polygons in KML file that aren't in population data.

This means KML file is bigger than it should be. Ultimately we
should remove the regions from the KML too, but doing it
programmatically is more flexible in the short term.
Revert "Don't draw polygon borders."

This change caused some polygons to not be properly filled.
This reverts commit bb08ec035c5ac4e10372026baeff4835b091e073.

Conflicts:

	web/index.html
Change title to "Evolution of Perth".
Don't draw polygon borders (new implementation).

Otherwise, newer jurisdictions which were historically part of
older areas will still appear separate, even though we plan to
make their names, etc. vary depending on the point in time.
Added team members to README.
Only allow one pop-up infoWindow at a time.
Extract function: densityToOpacity().
From Nathan: remove unneeded regions from the KML.
Fix: some visual artifacts when poly.style.width is zero.

Setting it to 0.01 seems to fix it, at least in Safari. Previously
I was seeing some strange colouring differences within the Perth
area for 1991.