middleman build after openlayers upgrade
removed the residuals of older build
flattened openlayers directory, and separated. now OpenLayers has its own folder
delete old files
addresses issue #1. lga switching is now OK when it's done in the summary view
adding ability to trigger callbacks when NMIS.Env values change. It will be very useful for triggering specific actions when certain things change. (e.g. when an LGA changes, but not a sector)