better management of cities level, the use of capitals didn't work so well because of the SQL sorting (look at Villeurbanne / Lyon in France currently), should fix #36
better display of admin_level 4 regions / provinces :
do not show labels for osm_id > 0 like in the main osm map, should fix #35
show regions label earlier and in a better way
some corrections on cities labels directions
some corrections on countries sovereign code (UK is better understood than RU)