lokacore

Lokathor's core-only odds and ends

Current features of note:

• Safe casting between plain data types. Supports T, &T, &mut T, &[T], and &mut [T].
• Safe versions of all stable sse, sse2, sse3, and rdrand intrinsics. At least, all the ones that can be made safe.

CI coverage: x86, x86_64, wasm, armv7, aarch64, thumbv7neon