Map doesn't center on unset marker if you click its name
Fixed: map doesn't recenter if you click marker that isn't set
Refactored infowindow html to limit repeated code. Fixed divide by zero bug on vote reset to 0.
Fixed bug caused by calling initialize() in display option checkboxes. Moved options check to separate function inside addMarkers
Fixed non-user-checkin option. Supposed to be non_user_checkin.
Added function comments to map.js
Refactored setOptionChecks to get rid of unneeded code
Refactored checkbox input changes to reduce code