Migrating the guide to AsciiDoc

[Mojca Miklavec]

Hi,

As requested during yesterday's meeting, here's the result of
automatic conversion of our guide from xml (docbook) to asciidoc:

    https://github.com/macports/macports-guide/tree/master/guide/adoc

This was initially explored by Aljaž and gives quite nice results
out-of-the-box, but there are still some issues with conversion that
will have to be addressed either by fixing docbookrx itself or
manually.

If anyone is willing to help in the process, your help will be appreciated.

Thank you,
    Mojca