Update Gemspec description for new sitemap extensions.
Update Gemspec description for new sitemap extensions.
kjvarga/sitemap_generator,zBMNForks/sitemap_generator,masterweb121/sitemap_generator,edusegzy/sitemap_generator,Velid/sitemap_generator,HisanoTakayasu/sitemap_generator,zBMNForks/sitemap_generator,Velid/sitemap_generator,SalzmanGroup/sitemap_generator,edusegzy/sitemap_generator,masterweb121/sitemap_generator,PikachuEXE/sitemap_generator,PikachuEXE/sitemap_generator,HisanoTakayasu/sitemap_generator,SalzmanGroup/sitemap_generator