* pr4: show value associated with selecting each letter (this was born
    out of a wish to see the city name in the prompt, instead of having to
    select '?' to see it, but was broadened to be shown for all "things")
  * pr4: many cosmetic changes (variable names improved, some more comments)
  * pr4: corrected buy preventing display of help-places text
  * pr4: don't ignore *.jpg in bin directory
  * pr4: more porting to miniade
  * pr4: renamed usage() to help()
  * pr4: ported to miniade 0.2.3
  * pr4: speed-up startup (caused by unnecessary count of places in places table,
    when checking if there are *any* entries is enough)
  * pr4: added debug to help track down slow map-click return
  * pr4: quick implementation of country/city database cache to avoid slow lookups
  * pr4: corrected '--help-places' text
  * pr4: lowered some debug levels that had been set to 2 to aid solving recent bugs
  * pr4: added missing format string parameter (first part of WP#142)
  * pr4: Suzie fixed second call to get_coords_from_exifgpsstrs() (closes WP#171)
  * pr4: Suzie committing pr4 with bug in new coordinates
  * pr4: converted parsers from dict to list so that ordering enforced and 
    derive filename parsers from *filename* regexps, not from user input
    regexps (closes WP#143)
  * pr4: Suzie added try/expect exception handling for the case where the input 
    GPSlatitude and GPSlongitute were not convertable to float (addresses bug WP#171)
  * pr4: added doc/Makefile to make graphs (partially addresses bug WP#172)
  * pr4: removed mvs and rename-old-photos (these may be useful if I ever write pr5)
  * pr4: updated mvs and rename-old-photos
  * pr4: decreased debugging
  * pr4: fixed issue with negative coordinates not being written to EXIF headers
  * pr4: allow negative coordinates (Suzie discovered this when trying to
    click on Glasgow and it not being accepted because it failed validation)
  * pr4: reinstated '--browser' option (it got removed after pr4
    was cloned from picrenamer3)
  * pr4: simplified colouring functions
  * pr4: fixed ctrl-u-removes-too-little-if-colours-present bug
  * pr4: detect exiftool reporting 'Error: JPEG EOI marker not found'
  * pr4: fixed bug whereby '0' as GPS coordinate got fixed in one place but
    not in another by fixing it when GPS info extracted from file
  * pr4: fixed bug where default desc value was taken from history when
    it should have been empty 
  * pr4: add-alias questions now in blue
  * pr4: added script mvs for helping perform misc name edits
  * pr4: added script for renaming old files
  * pr4: added debug to help with 5th bug found by Suzie (exiftool call
    failing)
  * pr4: corrected 4th bug found by Suzie (multiword cities were not allowed)
  * pr4: corrected 3rd bug found by Suzie handle where calling exiftool
    on files with quotes in their names caused crash
  * pr4: handle looking up nearest place when places table is empty
  * pr4: workaround for 2nd bug found by Suzie (use of colours
    in prompts makes CTRL-U not appear to work, though it has worked)
  * pr4: corrected 1st bug found by Suzie (use of confirm_guff instead
    of confirm_flag_guff)
  * pr4: updated todo list
  * pr4: fixed a usage message
  * pr4: improved database initialisation and help messages
  * pr4: more tidy up
  * pr4: tidy up after clone from picrenamer3