* full support for line_color directive (with and without category) in
  bbd files
* BBBikeLazy::bbbikelazy_remove_data: transfer to another $lazy_master
  if the current one was deleted
* BBBikeProcUtil: new function double_forked_exec
* MerkaartorPlugin: use double_forked_exec
* BBBikeViewImages plugin: use double_forked_exec
* BBBikeViewImages: support for GraphicsMagick (gm display)
* moved vbb-stops-to-bbd.pl from bbbike-aux
* FahrinfoQuery: use "vbb" datasource as default now. Required file is
  downloaded and converted (using vbb-stops-to-bbd.pl) if missing.
* babybike Makefile: removed "streets-bahn.bbd", this does not exist
  anymore
* cmdbbbike: new option -yaml
* Strassen::Core: use lexical filehandles
* new module DistDB (not official, just in miscsrc)
* fragezeichen2org.pl: new option --dist-dbfile

  This option enables _exact_ distance calculation using the new
  DistDB.pm module.
* check whether more plugins apply only to Berlin

  That's AltBerlin and FahrinfoRealtime. No check for FahrinfoQuery;
  theoretically it works also in some BRB cities and even in Poland.
* updated CHANGES (towards 3.18)
* removed README.release

  Release instructions are now in bbbike-aux/doc
* .sgml -> .xml
* regenerated html files
* data update
* new target fragezeichen-nextcheck.org-exact-dist