remove lon/lat from NodeCpp
added .metaNodes to EdgeCpp
now imports only nodes with degree > 2
all matching OsmNodes are connected to the edge as .metaNodes =
List<OsmNode>
added index.html with leaflet.js (without the api-key).
added a sample overlay.js
added HTML exporter
cleab up and moved OsmNode to its own class
changed getDistance to Spherical Law of Cosines
Merge pull request #1 from tbachcern/edges_with_meta

Edges with meta