Important Information on wkhtmltopdf for pdf generation in develop branch

[TurkerTunali]

You can update it by

wget https://downloads.wkhtmltopdf.org/0.12/0.12.5/wkhtmltox_0.12.5-1.xenial_amd64.deb
sudo dpkg -i wkhtmltox_0.12.5-1.xenial_amd64.deb
sudo apt -f install