Add some distance calculation with the settlements
Use the OpenLayers.js file that is in the repo
Big post Hack Weekend refactor.

Updating the popups after the data on the settlements works, but
only for the popup open at the time the data loads (if any). This
needs more thinking about...
Fix the popup updating bug.
Merge branch 'gh-pages' of github.com:cbaines/health-map into gh-pages

Conflicts:
	index.html