largest images are winning on what image overlays are on top during export
http://publiclaboratory.org/map/buss-farm-rosetta-south-africa/2011-10-08 as an example
yipes, there's actually no sorting on the export side. Plan:
And it would help issue #39, by letting people try exporting subsets of the full map if it's too big.
Relevant code: app/models/map.rb:323 for sorting, pre-compositing
various fixes for 2.0 launch, including routing, list display, export…
…ing, profile pages, error pages, and welcome msg; close #104 close #103 close #99 close #96