Plotting temperatures

I've rewritten my temperature plotting code in C++, so that there can't be any complaints from the Mono haters, and made it into a Google code project. So now anyone can easily plot historical temperature data in a variety of ways. You can look at temperatures for countries, geographical areas, latitudes, individual weather stations or globally. Also you can plot the number of active weather stations over time, either worldwide or within a particular area, and produce KML files so that their locations can be viewed using Google Earth.



I havn't tested this on Windows, but since both GCC and gnuplot can be run on Windows I expect that it could be recompiled for that OS with minimal or no modifications.