* automatic-deployment: check prerequisites first (existence of
  network connections to pps and live host)
* data update
* gpsman2gpx (and modules): it's possible to preserve comments now

  This is the default. The old behavior is still available with the
  -symtocmt switch.

  With test.
* another example in restrict_bbd_data.pl
* create new file berlin-fragezeichen-poi.gpx in persistent-tmp
* moved creation of some files to rare-persistent-tmp
* upload-personal target now creates a garmin .gpi file
* data update (minor)
* reorder persistent-tmp targets: fragezeichen-outdoor is now more
  informative than fragezeichen-outdoor-nextcheck
* split_street_citypart: fixed the "(... (...))" problem

  With test.
* fix for -layers option: now variant without str/p/sperre prefix
  actually works
* make_net_steigung: replaced "while each" -> "foreach keys"

  It happened again: exiting an each loop prematurely, leaving a hash
  iterator in an undefined state.
* data update (minor)
* ViewImages plugin: viewer for original images is now selectable

  For this feature the menu structure was changed, now the image size
  menu items are in an own menu cascade.
* zooming with scrollmouse
* data update (mainly update of exits and some adjustments around Biesdorfer
  Kreuz)
* adjusted test for changed data (exits changes)
* data update (minor)
* BBBikeGPS graph plotting: prevent possible "log of zero" errors
* data update (minor)
* data update (minor)