Readme file for generating Doxygen documentation for OSSO HelpLib

1. The Doxyfile configuration file is generated from Doxyfile.in by
autogen.sh in the main source directory.  It puts the correct version
into the documentation.
cd ..;./autogen.sh;cd -

2. Before generating the documentation it is good to clean up the old
one so that there won't be a mixup of old and new files.
rm -r html

3. Generate the documentation, the result will be in the directory html
doxygen Doxyfile
