Cosmology 30 hour lecture

# Cosmology lecture slides
# (c) Boud Roukema 2012, 2014, 2020 GPL-3+

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Presentation pdf for 30-hour course in cosmology. All materials are
fully free-licensed. See the download URLs for details of individual
figures, some of which have more permissive conditions than the
default CC-BY-SA-4.0 licence.
    
You should be able to create the pdf with `make -f Cosmology.mk`,
although you may have to install some standard packages such
as:
* fig2dev
* ghostscript
* imagemagick
* texlive-latex-base
* texlive-latex-extra
* texlive-latex-recommended
* xfig
e.g. in a Debian GNU/Linux or Debian derivative system such as Ubuntu, do
````shell
sudo aptitude install fig2dev ghostscript imagemagick \
  texlive-latex-base texlive-latex-extra texlive-latex-recommended xfig
````

Licence clarification: the source package (scripts) are GPL-3+; the Wikimedia Commons images are all CC BY-SA compatible, by definition; the pdf is CC BY-SA.