Move everything potentialy reusable to legacy

.gitignore

.gitlab-ci.yml

.jshintrc

configure.sh

legacy/index.js

legacy/sitegin/config.js

legacy/sitegin/gitInfo.js

legacy/sitegin/image.js

legacy/sitegin/imageResizer.js

legacy/sitegin/jobs.js

legacy/sitegin/markdown.js

legacy/sitegin/nunjucks.js

legacy/sitegin/parseHugo.js

legacy/sitegin/parseRedirects.js

legacy/sitegin/pipeline.js

legacy/sitegin/print.js

legacy/sitegin/readFiles.js

legacy/sitegin/resetJobs.js

legacy/sitegin/sitegin.js

legacy/sitegin/sitemap.js