Documentation format

We are working on updating the boost.org website, and when displaying the documentation of this boost library in that environment the display breaks due to the fact that ``s are used in the html. There will probably be a work-around, such as opening the docs in a new browser tab, but it would be preferable to either convert these docs to AsciiDoc as a modernization, or otherwise remove ``.

Start by reviewing how the iostreams documentation is displayed on the boost.org website and where the HTML frames are produced. Determine whether the documentation can be converted to AsciiDoc or whether the frames can otherwise be removed; done means the documentation displays correctly without the breaking frame layout.

Written by the indexing model from the issue text.