Add MontpellierVelomaggCity
Move ParisVelibCity in the correct folder
Add XMLCityWithStationDataInSubnodes (superclass of BixiCity)
Makes RennesVeloStar inherit XMLCityWithSubnodes
WIP refactor common parsing code
comments
Make NextBikeCity a subclass of _XMLCityWithStationDataInAttributes
deactivate custom annotations for cities
Remove LyonVelovCity header