This is a squash of 5 commits in order to add the new datasheet flow.
fix(datasheet): ensure datasheet can use images properly
fix(datasheet): white page when funding was not specified
This was caused by creating a page before first checking whether there was any content for that page beforehand, so it would result in a rogue white page with no content.
fix(datasheet): missing analog pin tables
fix(datasheet): tweak pandoc settings
Switching from `gfm` to `markdown` should enable more formatting options. The extensions have been configured to be similar to `gfm` but provide some additional things, like `line_blocks` and `lists_without_preceding_blankline`s.
yowasp-yosys can be installed from pip, so we no longer require the user to install yosys separately.
also freeze requirements.txt versions for reproducible builds
Kristaps Jurkans