markers aggregation, fixes #101
Merge branch 'master' of github.com:hasadna/anyway
Converted cities.csv to cp1255 instead of UTF8
Updated process.py to use node bridge, load type 3 2013 accidents
changed marker id type to bigint to accomodate new unique marker ids
Fix capitalization of DicStreets files

process.py was getting an exception because the file was not found
Move checkbox code to sidebar.js; call loadMarkers, fixes #102
Simplify checkbox logic

Remove checkboxes completely and only use img elements.
Set tooltip to "multiple markers" if a marker will be spiderfied when clicked, fixes #106
Fix unspiderfy error due to missing bind()
Update sidebar marker list on load
Load markers when zooming back in, fixes #103
Add vertical scrollbar to sidebar when needed
Immediately open popup when navigating to spiderfiable marker
Keep markers spiderfied when clicking one of the markers in the spider

We don't want the spider to close when we open the pop-up of one of the markers
Fixes to opening markers that needs spiderfying

When navigating to a marker or selecting one from the sidebar, spiderfy and
immediately open the popup.
When clicking on another marker or on the map, unspiderfy and also close the
popup.