Archive my logrel talk: add sources for reproducibility, link to YouTube video

WS2021/logrels/README.md

WS2021/logrels/guide.pdf

WS2021/logrels/slides.pdf

WS2021/logrels/sources/.gitignore

WS2021/logrels/sources/.latexmkrc

WS2021/logrels/sources/README.md

WS2021/logrels/sources/bib/kwarc/.gitignore

WS2021/logrels/sources/bib/kwarc/.gitrepo

WS2021/logrels/sources/bib/kwarc/.travis.yml

WS2021/logrels/sources/bib/kwarc/LICENSE

WS2021/logrels/sources/bib/kwarc/Makefile

WS2021/logrels/sources/bib/kwarc/README.md

WS2021/logrels/sources/bib/kwarc/ako.bib

WS2021/logrels/sources/bib/kwarc/bibtweaks.sty

WS2021/logrels/sources/bib/kwarc/deprecated.bib

WS2021/logrels/sources/bib/kwarc/extcrossrefs.bib

WS2021/logrels/sources/bib/kwarc/extpubs.bib

WS2021/logrels/sources/bib/kwarc/kwarc.bib

WS2021/logrels/sources/bib/kwarc/kwarccrossrefs.bib

WS2021/logrels/sources/bib/kwarc/kwarcpubs.bib