Python-libeconf

* CMake fixes regarding installation of econftool and man pages.

* Man pages libeconf.3 and econftool.8.
* Handling multiline strings.
* Added libeconf_ext which returns more information like
line_nr, comments, path of the configuration file,...
* Econftool, an command line interface for handling configuration
files.
* Generating HTML API documentation with doxygen.
* Improving error handling and semantic file check.
* Joining entries with the same key to one single entry if
env variable ECONF_JOIN_SAME_ENTRIES has been set.
* new API call: econf_readDirsHistory (showing ALL locations)
* new API call: econf_getPath (absolute path of the configuration file)

* Convert the build to include CMake as an option, remove autotools

* Fix issues identified with i586 build thanks to the move to meson

* Add C++ compatibility and Add support for Meson

* Initial Haiku Port
* Bugfix: helpers.c - Check for empty value (NULL pointer) before calling strdup.