README - formatting, configs and useful links

MR !26 looks good to me.
So moving to RTBC.

@Manoj looks good to me RTBC+1.

* Introduction (ok)
* Requirements (ok)
* Recommended modules (ok)
* Installation (ok)
* Configuration (ok)
* Troubleshooting (ok)
* FAQ (ok)
* Maintainers (ok)

Some of the information in this is outdated and actually incorrect. I don't see any of this being particularly useful over what is on the project page. Closing.