fix ##frontend link
add #httpd, #dns, and #web links

Fixes #18
add w3 validators to the docs links

Fixes #23
add cheat sheets to the docs

Fixes #24
add FAQ about form styling

Fixes #22
add note about CMS templates to /using

Fixes #20
should not have more than one h1 on a page
add more common FAQs

Fixes #16
add color contrast check tool

Also better categorize the Websites for Non-Jerks, though really we
should probably just subsume all that content into this site.
add links to info about browser developer tools

Fixes #25
add section links for Tutorials page
improve responsiveness and fix missing menu

The toggle button for the responsive top-bar was missing.

Also don't reduce the width of the page too much when getting smaller.
We really ought to do something with that extra space over there...

Fixes #21