There are some API changes to get better libcfg+ parsing context creation functions.
All elements are now counted from 0 to get analogical behaviour in command line array
items, configuration file bytes, and configuration file lines. A bug with property
cleaning has been fixed. Various virtual properties have been added for setting up
two or more real properties in one function call. Some internal functions have been
improved. There are documentation updates.

   version 0.5.2, July 19, 2002 (official release)
   
     * important API changes to get better libcfg+ parsing
       context creation functions; parameter argc and end_pos are
       not used in standart context creation functions, parameter
       size is used instead; if you already use libcfg+, please
       make following substitutions:
          + cfg_get_cmdline_context() function call for
            cfg_get_cmdline_context_argc()
          + cfg_set_cmdline_context() function call for
            cfg_set_cmdline_context_argc()
          + cfg_get_cfgfile_context() function call for
            cfg_get_cfgfile_context_pos()
          + cfg_set_cfgfile_context() function call for
            cfg_set_cfgfile_context_pos()
     * all elements are now counted from 0 to get analogical
       behaviour in command line array items, configuration file
       bytes and configuration file lines; in fact, this issue
       affects only configuration file lines, which was counted
       from 1 till this change
     * fixed bug with property cleaning
     * various virtual properties added for setting up two or
       more real properties in one function call
     * improved internal functions split_multi_arg() and
       unquote_single_arg()
     * example is now installed with documentation
     * documentation update