Add links to Documenting Modules page (3.0)

Add link to modules_documentation.html page to each modules page.
Actually commented out the comment in Module Fundamentals.
Create new page for README template

Create new, standalone page for the module README template.
Create new page for Documenting Modules

This page is a walk through of the README template with a link to the
standalone template. Best practices are being worked out with Hunter,
Ryan, myself and a community member.
Add links to Documenting Modules page in each module page (2.7)

Add links to new Documenting Modules page in each document. Comment out
the comment in Fundamentals.
Create new Documenting Modules page in 2.7

Create Documenting Modules page with instructions for README template.
Create standalone README template page

Same as with 3.0
Fix template link and add sidebar link for module docs
Merge commit 'e7962e32a887678bf3eaa22d76d3ccc204d736c3'