POC for ol3 drawing controls
integrated ol3 drawing tools onto main map, removed leaflet
save spot data as geojson
map should always render geojson objects from persistence layer
NewSpot service holds entire geojson object for spot, not just geometry
fixed spot drawing on vector layer, added lat/lng overwriting capacity
spots created from the spot menu now default with lat/lng textboxes available
integrated offline storage into main map
separated offline functions into a factory
drawing tools are now smaller and have better UI
moved map styling to style.css
removed leaflet references
removed draw menu
renamed Offline menu item
added button to cache tiles
began work on slippy tile name factory
restore map view
Merge pull request #23 from StraboSpot/drawOl3-markers

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