Buildings to TAZ association improvements

[lcodeca]

One of the bottlenecks of the scenario generation is the association of the buildings with the appropriate TAZ and the definition of the building's accesses.

[lcodeca]

Try to incrementally increase the radius of getNeighboringEdges in order to find the right edges and minimize the number of lookups.

[lcodeca]

Try to build a subnetwork with rtree (like it's done in the sumo tools) for each TAZ and use it to associate the buildings and the entrances.