Provide option to use base PDF courier

[eprovst]

Description

Every PDF reader comes with 14 fonts preinstalled, Courier is one of them. When you export a PDF using Courier Prime or Courier New the font has to be embedded in the file, resulting is larger files. If you use the base Courier no font is stored in the PDF resulting in a potentially much smaller file size.

Adding this isn't too much work, however the PDF library we're using doesn't support the base 14 fonts (yet) so it's blocked upstream.