* running 2to3
* doing manual conversions
* walk-through files to find compile errors
* fixes after running textures.manager, osm2city, osm2pylon, roads, piers and platforms

Clean-up of coordinates.py plus more calculation methods for global coordinates. Small patch to get cables more in line where segments break by using difference between local and global heading

formula. Seems OK for distance up to a few km.

- LOD lists with xml writer -- test, not enabled ATM
- limit max number of objects
- longest edge is first
- textured roof is now kid
- create gable roofs