Doxygen documentation

[Dr . Jürgen Sauermann]

    Hi everybody,
      
      as some of you have noticed, there were some disturbances lately
      with SVN updates of GNU APL.
      
      These disturbances were caused by my bad idea to make, as a matter
      of convenience,
      the Doxygen documentation of GNU APL visible (and browsable) by
      checking it in into
      SVN so that you could browse it online. The idea was bad for a
      number of reasons:
      
      1. The  Doxygen documentation
      consists of more than 21,000 files, which slows down the
      svn up significantly.
      
      2. More importantly, you can only browse the documentation with
      e.g. the chromium
      browser and from the SVN repository, but not with e.g. firefox and
      from SVN, and with
      none of the browsers from git.
      
      3. The reason seemed to be some CORS (cross origin resource
      sharing) problems
      with firefox (which seems to be more strict) while chromium seems to care less.
        
        For the above reasons I have removed the
          Doxygen documentation from SVN
          and hopefully also from git.
         
        Sorry for the trouble,
        Jürgen