Uses the filter-out Make text function

"Returns all whitespace-separated words in text that do not match any of
the pattern words, removing the words that do match one or more."

http://www.gnu.org/software/make/manual/make.html#Text-Functions

Telling people to point back to this site

Make templates consistent with how links are checked- v2

Add build of FAQ.html

068cb3ab didn't update the HTML.

Template changes to work with validator according to current link validation rules. Also update HTML output.

Explaining the new "deferred" label

Fix error message at validator

Use INFO for http link verification

This reverts commit 0b370670.

Revert "Minor changes to make error messages consistent, and possibly less crashy. Still need unit tests to trigger this code."

This reverts commit 8c0819be.

Improve message for glossary error

Minor changes to make error messages consistent, and possibly less crashy. Still need unit tests to trigger this code.

fill in missing '$ ' in prompt

Improve callout box and "learning objectives" box

Add small script to setup label in lesson repo

Update validator for changes in directory structure

Updating files to move  into root directory

Add id to glossary entry