* data update (very minor)
* bitonic tour heuristic for Salesman plugin
* BBBikeCGI::Cache: don't die on race conditions

  A directory could be created while File::Path::mkpath is running, so
  don't die here, but instead just check for the existence of the
  directory.
* check_crossings: don't split for -ignorerx

  It's not necessary to split here on comma, one can use regexp
  grouping/alternation anyway.
* Makefile target for crossings.bbd: ignore the one problematic entry here
* data update
* data update