Fix documentation markdown syntax with lint rule

ref: https://github.com/markdownlint/markdownlint/blob/master/docs/RULES.md

Most of my modified are about following rules:

* MD001 Header levels should only increment by one level at a time
* MD009 Trailing spaces
* MD026 Trailing punctuation in header
* MD027 Multiple spaces after blockquote symbol
* MD031 Fenced code blocks should be surrounded by blank lines

and I change `prereqs/k8s-single-node.md`, `prereqs/k8s-multi-node.md`'s
`Done` to `Next Step`, because with trailling punctuation in header
offend MD026.

Change-Id: Ibe173518b972c02f990ffe8309fa87a8fcabb054
13 files changed
tree: 00f2192a4f8219527d2e80b60175494d3981ef72
  1. .gitignore
  2. .gitreview
  3. Makefile
  4. README.md
  5. SUMMARY.md
  6. book.json
  7. charts/
  8. developer/
  9. fabric-setup.md
  10. images/
  11. mdl_relaxed.rb
  12. mdl_strict.rb
  13. navigate.md
  14. operating_cord/
  15. overview.md
  16. package.json
  17. partials/
  18. prereqs/
  19. profiles/
  20. quickstart.md
  21. terminology.md
README.md

Installation Guide

This guide describes how to install CORD. It identifies a set of prerequisites, and then walks through the steps involved in bringing up one of two CORD profiles:

If you are anxious to jump straight to a Quick Start procedure that brings up the an emulated version of CORD running on your laptop (sorry, no subscriber data plane), then that's an option.

Alternatively, if you want to get a broader layof-of-the-land, you might step back and start with an Overview.