Add PR

Made somewhat of a press release/welcome/intro to EverythingDojo.
Doing it in a separate branch because it might take a while (and I
don’t want to ruin anything - I’m not very good at git).
Remove welcome_files/

Since I downloaded the presentation from Strut with Chrome, it created
a directory of files needed for the actual page (.html) along with the
page.  I integrated these include files (mostly fonts and images) so we
don’t have another directory clouding our workspace/server.
Merge branch 'PR-Introduction'