add hugo-geekdoc theme v0.13.4

themes/hugo-geekdoc/.chglog/CHANGELOG.tpl.md

themes/hugo-geekdoc/.chglog/config.yml

themes/hugo-geekdoc/.npmrc

themes/hugo-geekdoc/CONTRIBUTING.md

themes/hugo-geekdoc/LICENSE

themes/hugo-geekdoc/README.md

themes/hugo-geekdoc/VERSION

themes/hugo-geekdoc/archetypes/docs.md

themes/hugo-geekdoc/archetypes/posts.md

themes/hugo-geekdoc/assets/js/search.js

themes/hugo-geekdoc/assets/search-data.json

themes/hugo-geekdoc/assets/sprites/geekdoc.svg

themes/hugo-geekdoc/data/assets-static.json

themes/hugo-geekdoc/data/assets.json

themes/hugo-geekdoc/images/readme.png

themes/hugo-geekdoc/images/screenshot.png

themes/hugo-geekdoc/images/tn.png

themes/hugo-geekdoc/layouts/404.html

...hugo-geekdoc/layouts/_default/_markup/render-heading.html

...s/hugo-geekdoc/layouts/_default/_markup/render-image.html