This is just the theme file for http://rentzsch.tumblr.com. About the only weird thing about it is that the source template.html has C Preprocessor directives in it. That's to generate three variants from a single source file:
HTML: Plain old HTML so that I can run BBEdit's built-in syntax checker on it and get a live preview.
Tumblr: The original destination for this file.
MarsEdit: Uses a similar but incompatible template syntax (
cpp invocations are hard to remember, so I put them all into a .command file, one for each variant.