v0.4.3

Changed

• The binary is a third smaller: 8.4 MB to 5.7 MB on Windows. Link-time
  optimization across the whole program, one codegen unit, symbols stripped,
  and no unwinding tables, since thoth has nothing that has to run while a
  panic travels and the terminal is put back either way.
• The demo screens behind --view are no longer compiled into a release
  build at all. They were dead code in one, but only because the optimizer
  noticed.

Full changelog: v0.4.2...v0.4.3