Rather than producing separate files for each module, the default build now
produces a single file. This should encourage better page-load performance as
the files were relatively small. Also, it's easier to deal with only one file
rather than many, especially if you're not quite sure what the dependencies are.
You may still create minimized builds, if you don't want every feature.
This commit also demotes the chart components to the examples directory, rather
than keeping them as part of the core library. As always, D3 is not a charting
library, and these were ever only intended to serve as examples.
d3.geom.polygon(…).area() assumes screen pixel coordinates with (0, 0)
at the top left, and y increasing going downwards. This results in a
positive area for counterclockwise coordinates. Howver, the default
centroid calculation was assuming "usual" Cartesian coordinates with y
increasing going upwards, hence the centroid coordinates were
incorrectly multiplied by -1.
This fix won't affect d3.geo.path(…).centroid() as it passes a constant
to d3.geom.centroid.
Mike Bostock
Jason Davies