fix for issue #23, deletes colophon adds it to front matter history of this book

[Austing767]

Changes

Per request, I moved the wording from the colophon to the front matter of the book. Updated some of the verbiage to better match the updated context.

Related issues

Fix for #23 relates to #24 potential merge conflict.

Testing

Ran and built locally, approved by @coco3427
Needing approval from @pearcej

[pearcej]

I think this is a much better placement since a colophone of a book is typically used to discuss the publisher, not the history. See https://en.wikipedia.org/wiki/Colophon_(publishing). So, this seems better.

One issue I see with it currently is that both links are failing. Please correct the link for pandoc to where it lives now, namely https://pandoc.org/. I don't see the original md file for the original in this repository. I would recommend either removing the sentence completely or saying "the original markdown for this file used to reside at..." since it might be in the Wayback Machine I suppose. @bnmnetp might have more to say about this.

[bnmnetp]

I don't think anyone cares about my personal journey from RST to markdown to RST to ... Fine to delete it.

[bnmnetp]

It kind of feels odd to have it written in the first person given that the book now has many authors.

[pearcej]

@Austing767 don't worry about fixing this. There are a few other changes that I plan to make. @bnmnetp I will fix the first person and discuss the original restructured text, etc.

[pearcej]

I don't think anyone cares about my personal journey from RST to markdown to RST to ... Fine to delete it.
I actually think it's pretty interesting!