More gametests

[SquidDev]

Creating omnibus issues is always a bit of a risk (see #91 which never got finished) but, in the vein of #1677, I think it's useful to have a place to jot down things which it would be nice to game test, but I haven't got round to yet.

• Printers:
  • Block states are set correctly: probably want something like disk drives, so testing both manual inventory manipulation, and then main printer peripheral flow.
  • Correct pages are generated.
  • newPage and endPage handle overflows correctly.
• Turtles:
  • Sided inventory interactions - check whether we can suck/insert on specific sides of a furnace.
  • Equipping turtle tools.

[SquidDev]

Might also be nice to have some tests for ServerComputer lifecycle, so we can catch things like #1760. It's irritating - ideally these would be unit tests, but that code is quite tied to having a MinecraftServer present.