Added Vagrant directories to .gitignore.
Added *.tif.aux.xml to .gitignore.

Temporary files generated when processing maps, not needed.
Temporarily switched back to mathuin/gdal.

Found another minor bug, this time with geometry validity checks.
New biome approach uses geometry instead of raw pixels.

The landcover files are now polygonized, generating collections of
pixels pertaining to a particular landcover code.  These collections
are then processed as a group.  Tests have been written and they do
pass.
Fixed new biome code, minor cleanup, better debug.

Put the array index method's debug behind its own variable, fixed the
array index method's mistakes, changed a method name or two, removed
the old tests.
Added build package, cleaned up documentation a little.

The build package is where the magic will happen!
No need for build package.

Turns out everything here should go into carto, which might get broken
down itself.
Adding first pass at build code.

This duplicates some of the biome code, but I wanted to commit it
while it was (mostly) working.  There are some snafus with the
polygonize stuff apparently dropping things on the floor, and I don't
yet know how to deal with that.
Removed biome, added correct transform.

Somewhere along the line I forgot to apply the scale transform to the
final map. Whoops!  Better now.
Made Points sortable!

It's sometimes helpful for debugging to sort the points in a list.
Added trivial XZ->Points converter.

Just add Y!