Exposes unsound APIs, lots of unverified syscalls.

Reviewed:

src\arch*.rs: Skimmed... looks reasonable, but didn't verify correct instructions / register invalidation.

src\io\dma.rs: Some unsafe... looks correct, but not thoroughly tested.
src\io\io.rs: +1
src\io\mmio.rs: UNSOUND (can construct uninitialized() T via "safe" Mmio::new()!)
src\io\mod.rs: +1
src\io\pio.rs: Some unsafe... looks reasonable, but didn't verify correct instructions.

src\scheme\generate.sh: +1
src\scheme\mod.rs: +1
src\scheme\scheme*.rs: UNSOUND (can construct arbitrary slices from arbitrary Packet s via Scheme*::handle)

.cargo_vcs_info.json: +1
.cargo-ok: +1
.gitlab-ci.yml: +1
Cargo.toml: +1
Cargo.toml.orig: +1
LICENSE: +1
README.md: +1

Skimmed:

src\call.rs: Lots of unsafe syscalls... unverified.
src\data.rs: UNSOUND (Map deref etc.)
src\error.rs: No tests for STR_ERROR, but at least it's sound.
src\flag.rs: Sound, magic constant city, meh.
src\lib.rs: LEAKS UNSOUND TRAITS into public interface!
src\number.rs: Safe, magic constant city.
src\tests.rs: Unsafe, but only #[test]s