This is a GitHub pages site using the Jekyll Cayman theme, and I hacked the _layouts/default.html and the assets/css/style.scss
index.html is the Home page
any other top level Markdown file will be shown in the nav bar, using the frontmatter title
the Photos page will automaticly show all images in the Photos/ sub directory. The file name will be used as a title, unless it is IMG_####.
if you add a file to the _posts directory a link to it will be added to the home page with an excerpt. the file must be named YYYY-MM-DD-Title.md just copy an existing post and edit it.