New aging portal! This is initial work for providing a full community webservice for aging.

This is a stub until David edits it! Or Rob. See this link to [edit](https://github.com/genenetwork/gn-docs/edit/master/general/brand/aging/home.md).

For markdown check [the docs](https://commonmark.org/help/). To embed images you can use a link somewhere from the internet or check it into the gn-doc repo and I'll add a link.