Update posts/2021-03-06-welcome.md, posts/1.rst, README.txt, conf.py,...

Update posts/2021-03-06-welcome.md, posts/1.rst, README.txt, conf.py, files/favicon.ico, files/images/nikola.png, templates/book.tmpl, pages/1.rst, pages/bootstrap-demo.rst, pages/charts.rst, pages/creating-a-theme.rst, pages/dr-nikolas-vendetta.rst, pages/extending.rst, pages/internals.rst, pages/listings-demo.rst, pages/path_handlers.rst, pages/quickref.rst, pages/quickstart.rst, pages/social_buttons.rst, pages/theming.rst, pages/manual.rst, listings/hello.py, listings/pycache/hello.cpython-39.opt-1.pyc, listings/pycache/hello.cpython-39.pyc, galleries/demo/tesla2_lg.jpg, galleries/demo/tesla4_lg.jpg, galleries/demo/tesla_conducts_lg.jpg, galleries/demo/tesla_lightning1_lg.jpg, galleries/demo/tesla_lightning2_lg.jpg, galleries/demo/tesla_tower1_lg.jpg, galleries/demo/exclude.meta, galleries/demo/index.txt, galleries/demo/metadata.sample.yml files Deleted public/categories/index.xml, public/page/index.xml, public/post/index.xml, public/tags/hi/index.xml, public/tags/index.xml, public/favicon.ico, public/index.xml, public/sitemap.xml, static/favicon.ico, themes/Lanyon/layouts/indexes/category.html, themes/Lanyon/layouts/indexes/indexes.html, themes/Lanyon/layouts/indexes/posts.html, themes/Lanyon/layouts/partials/categories.html, themes/Lanyon/layouts/partials/footer.html, themes/Lanyon/layouts/partials/ga.html, themes/Lanyon/layouts/partials/head_includes.html, themes/Lanyon/layouts/partials/header.html, themes/Lanyon/layouts/partials/prev_next.html, themes/Lanyon/layouts/partials/sidebar.html, themes/Lanyon/layouts/posts/li.html, themes/Lanyon/layouts/posts/single.html, themes/Lanyon/layouts/posts/summary.html, themes/Lanyon/layouts/index.html, themes/Lanyon/static/css/lanyon.css, themes/Lanyon/static/css/poole.css, themes/beautifulhugo/archetypes/default.md, themes/beautifulhugo/data/beautifulhugo/social.toml, themes/beautifulhugo/i18n/en.yaml, themes/beautifulhugo/i18n/ja.yaml, themes/beautifulhugo/i18n/ru.yaml, themes/beautifulhugo/images/screenshot.png, themes/beautifulhugo/images/tn.png, themes/beautifulhugo/layouts/_default/baseof.html, themes/beautifulhugo/layouts/_default/list.html, themes/beautifulhugo/layouts/_default/single.html, themes/beautifulhugo/layouts/_default/terms.html, themes/beautifulhugo/layouts/partials/disqus.html, themes/beautifulhugo/layouts/partials/footer.html, themes/beautifulhugo/layouts/partials/footer_custom.html, themes/beautifulhugo/layouts/partials/head.html, themes/beautifulhugo/layouts/partials/head_custom.html, themes/beautifulhugo/layouts/partials/header.html, themes/beautifulhugo/layouts/partials/nav.html, themes/beautifulhugo/layouts/partials/post_meta.html, themes/beautifulhugo/layouts/partials/translation_link.html, themes/beautifulhugo/layouts/shortcodes/figure.html, themes/beautifulhugo/layouts/shortcodes/gallery.html, themes/beautifulhugo/layouts/shortcodes/load-photoswipe-theme.html, themes/beautifulhugo/layouts/shortcodes/load-photoswipe.html, themes/beautifulhugo/layouts/404.html, themes/beautifulhugo/layouts/index.html, themes/beautifulhugo/static/css/highlight.min.css, themes/beautifulhugo/static/css/hugo-easy-gallery.css, themes/beautifulhugo/static/css/main-minimal.css, themes/beautifulhugo/static/css/main.css, themes/beautifulhugo/static/css/pygment_highlights.css, themes/beautifulhugo/static/img/404-southpark.jpg, themes/beautifulhugo/static/img/avatar-favicon.png, themes/beautifulhugo/static/img/avatar-icon.png, themes/beautifulhugo/static/img/favicon.ico, themes/beautifulhugo/static/img/hexagon-thumb.jpg, themes/beautifulhugo/static/img/hexagon.jpg, themes/beautifulhugo/static/img/path.jpg, themes/beautifulhugo/static/img/sphere-thumb.jpg, themes/beautifulhugo/static/img/sphere.jpg, themes/beautifulhugo/static/img/triangle-thumb.jpg, themes/beautifulhugo/static/img/triangle.jpg, themes/beautifulhugo/static/js/bootstrap.js, themes/beautifulhugo/static/js/bootstrap.min.js, themes/beautifulhugo/static/js/highlight.min.js, themes/beautifulhugo/static/js/jquery-1.11.2.min.js, themes/beautifulhugo/static/js/load-photoswipe.js, themes/beautifulhugo/static/js/main.js, themes/beautifulhugo/.gitattributes, themes/beautifulhugo/.gitignore, themes/beautifulhugo/LICENSE, themes/beautifulhugo/README.md, themes/beautifulhugo/theme.toml, 404.md, README.md, about.md, atom.xml, config.toml, content/page/about.md, content/_index.md files