Lacking font installation instructions

[johnblommers]

The LaTeX section of the manual does not indicate how to install the Crimson, Fontsquirrel and Source Code Pro fonts. The following worked for me:

We need to install Crimson font.

cd ~/Downloads
git clone https://github.com/skosch/Crimson.git
cd Desktop Fonts/TTF
cp *.ttf ~/.fonts
cd ../OTF
cp *.otf ~/.fonts/

And the Poppins font. Download poppins.zip.

cd ~/Downloads
unzip pippins.zip
mv Poppins*.otf ~/.fonts/
rm "SIL Open Font License.txt"

And the font Source Code Pro.

cd ~/Downloads
git clone https://github.com/adobe-fonts/source-code-pro.git
cd source-code-pro
cp TTF/*ttf ~/.fonts/
cp OTF/*otf ~/.fonts/
cp VAR/*.[ot]tf ~/.fonts/