adding doxygen

new file: doc/Doxyfile new file: doc/Doxyfile2 new file: doc/addons/bootstrap/jquery.smartmenus.bootstrap.css new file: doc/addons/bootstrap/jquery.smartmenus.bootstrap.js new file: doc/addons/bootstrap/jquery.smartmenus.bootstrap.min.js new file: doc/addons/keyboard/jquery.smartmenus.keyboard.js new file: doc/addons/keyboard/jquery.smartmenus.keyboard.min.js new file: doc/customdoxygen.css new file: doc/doxy-boot.js new file: doc/footer.html new file: doc/header.html new file: doc/jquery.smartmenus.js new file: doc/jquery.smartmenus.min.js new file: doc/new_footer.html new file: doc/new_header.html new file: doc/new_stylesheet.css new file: src/plugins/README.md