This emulator provides a rough way for binaries designed for this CPU to be
executed in a virtual/emulated CPU for testing purposes. This patch also adds
a small test setup for automated assembly, execution and checking of register
postconditions for programs.

These tools are currently fairly useless for real-world programming. Each of
them takes in either asm or binary, translates this to the internal intermediate
representation of a list of instruction structs, and then translates and outputs
in the same format that they took it in. These are mostly oly useful for testing
purposes, but may one day be useful if e.g. an optimiser stage is put in between
the input and output stages.