implementing lists
tinkering with focus methods
adding list to build process
experimenting with hiding markers as needed for clusters. hide/show logic works, but in wrong direction :(
using a cell-based algorithm performs better, works. numbered marker stand-ins still need to implement mapapi.uiitem.list to provide access to hidden markers
passing on click events via the cluster list works now. probably closes #1
removing debugging code
Merge branch 'master' into opensim