http://creativecommons.org/licenses/by-sa/4.0/legalcode.txt

A prettier formatted version of this license is available on Creative
Commons' website at:
     https://creativecommons.org/licenses/by-sa/4.0/legalcode

Generally, Git repositories prefer not to to have text files with trailing
whitespace characters in them.  As such, this commit is applied, even though
it changes the checksum of the canonical license text as downloaded from:
    http://creativecommons.org/licenses/by-sa/4.0/legalcode.txt

However, this appears to be the right thing to do here.

Per discussions with Behan Webster, he indicates the intent of all licensing
for slides and written materials should be CC-By-SA-4.0.  Better if this is
clearly stated in the README.

This file appears to not actually be used in the building of the slides found
in 'buildroot'.  As such, they are removed.