Adoptions to generate images for Wikipedia.

https://commons.wikimedia.org/wiki/File:Netzplan_Stra%C3%9Fenbahn_Innsbruck_2012.png
Code comments, bug fixes.
IVB: tune labels.
IVB: tune labels.
Add proposed extensions (railway=proposed).
Tune labels
Use standard mapnik style, CSS transform gray
Semicircles for stops
Big refactoring into POImap and IVB object.
Fix AED url
Update to Leaflet 0.4.5
Add WIWOSM demo.
Add transport map to layers.
Merge branch 'wikipedia' of github.com:simon04/POImap into wikipedia

Conflicts:
	ivb.html
Increase font size. Tune labels.
Make angle computation more robust.
Evaluate "colour", "color" w/(o) #.
Remove no longer existing MapBox layers
Code style/warnings
Increase font size for terminal stops