Fix import issues.
Prepare atlases for text rendering!
Fix input of system parameters to layout.
Import Font' to pass in system font.
Draft additional layout inputs.
Typesystem/import fixes.
Keep the SDL window open!
Trial use of SDL2 rendering.
Draft CatTrap integration (layout code).
Fix CatTrap integration.
Draft integration of CatTrap.
Add a useragent stylesheet (& README).
Compute styletree.
First!