Contributors portal: Changed which tilestache layers are cleared when edits are made. Now includes the features and labels, plus the resulting 'single stack' versions used largely by mobile
Retired the OVERLAYS concept in favor of the single-layer versions inspired by mobile. Basemaps now have closures and markers and labels all baked in. Result is 2/3 decrease in the number of hits that are made every time someone pans or zoooms.