Profiles carry their about text and links !33

profile show reports about, about_format and links; the app decoded none of them.

• ProfileViewModel.Profile gains about, aboutFormat and links, plus aboutFile — the server has no filename to dispatch on either, so the stored format picks about.org or about.md, and anything but org is markdown.
• ProfileView renders an About section between the people rows and the activity graph, matching the web's order, through the same ReadmeView the repo READMEs use.
• Links sit in the header below the website; a link without a label shows its URL, as the web does.