Add instructions for installing Python depsIdentified several libraries which were not installedby default on my computer
Add instructions for installing Python depsIdentified several libraries which were not installedby default on my computer

Signed-off-by: Nick Felker <966af3139f53a50f07af2611a7f21d7cd6f680fc@gmail.com>

SymbiFlow/symbiflow-arch-defs,SymbiFlow/symbiflow-arch-defs