Load the Natural Earth country data to avoid having to depend on the
script for generating bounding boxes.

Let d3 handle the centering of the projections to the specified bounds.

Also start working on consuming bbox data.

The growing bounds are now respected from the input map bounds. For
instance, the Mercator scales appropriately with the out-of-bound
points.

In addition, a wrap-around option is available for when checking if a
point's inversion inverses to the original point.

Separate project method for images with projectPoint.

Add files from Pridepack.