Convert About section to RST

[RitaOC]

Worked on the conversion of the About section, including it's subsections.

[RitaOC]

Issue: #216

Kindly Review @RCheesley @fakela @favour-chibueze

[RCheesley]

@RitaOC please can you address the headings using the wrong nesting?

I just wrote up some docs which you can review here: https://github.com/mautic/mautic-community-handbook/pull/242/files#diff-479d15272f6690640302496b1f2a15541a9a8ce28b7e5c68c2a8bd6063fe2551 which contains all the details you should need to address this.

[RitaOC]

Thanks @RCheesley, I've worked on the heading kindly review.

[RCheesley]

Thanks for working on this @RitaOC - I think perhaps this would sit better as one single file - About - which has all of the content as subheadings? The beauty of our RST/Sphinx/RTD setup is that these subheadings are all nested underneath each other on the menu, so it will work pretty nicely I think.

[RitaOC]

Thanks for working on this @RitaOC - I think perhaps this would sit better as one single file - About - which has all of the content as subheadings? The beauty of our RST/Sphinx/RTD setup is that these subheadings are all nested underneath each other on the menu, so it will work pretty nicely I think.

@RCheesley please how can I go about this? Just using the heading syntax will that work?
H1

H2

---

H3

H4

H5

H6
^^^

[RCheesley]

@RitaOC yes that's right - the navigation on the menu is controlled by the nesting of the headings. So if we bring everything into one file, and nest the headings correctly, I think that'll be easier for people to explore/navigate and it's easier for us to maintain, too!