diagnostics for older JOSM without RemoteControl plugin
bbbike chooser: add -debug option
bbbike chooser: flash button of a freshly downloaded city
bbbike chooser: avoid horizontal scrollbar

create_adjust_geometry_cb uses a slightly larger constant for the
scrollbar width, so there's no horizontal scrollbar anymore (seen at
least on a Debian/squeeze system).
osm2bbd: handle also data files from Overpass API

There are extra <note> and <meta> elements here, which needs to be skipped.
osm2bbd: exclude difficult paths for cycle routing

Mark paths like "climbing_access" and most paths tagged with sac_scale
as blocked for cyclists.
ttdump: generate "DO NOT EDIT" comment
bbbike-snapshot.cgi: redirect to github zip archive
data update (minor)