better diagnostics in choose_Berlin_by_data

Tell user what to do if the Berlin.coords-by-{citypart,zip} files are
missing.
toolserver moved to wmflabs

Corrected link in info window.
data update (mainly updates in Franz. Buchholz)
some hacks for Map::Metro
check openrailwaymap.org
Map Compare now supports up to 108 maps: http://mc.bbbike.org/mc/
Merge remote-tracking branch 'eserte/master' into world
indent
update