_leaflet_id instead of _leafletId
Merge pull request #2 from nrenner/leafletid

_leaflet_id instead of _leafletId
Minor code formating fix
Remove trailing line endings
Implement proper #toGeoJSON() export method
Use new #toGeoJSON() method
Ignore swap files
Fix synconous geometry export
Fix #toGeoJSON() as pointed out by @torbjornmeistad
Fix documentation for #toGeoJSON()
Fix ordering of latlng for #toGeoJSON()