Build website from master branch www directory

Jordan Justen requested to merge jljusten/waffle:master into master

This add the source files from website branch into the master branch under the www directory.

This change is a work-around for the issue documented in #56 (closed), but it also doesn't hurt to make the webpage source be in the master branch like Mesa.

Successful pipeline:

Deployed webpage with 1.6.1:

Does the www directory seem ok? Or, should we use docs like Mesa?

Cc: @evelikov, @eric

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