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 rdrand, sse, sse2, sse3, ssse3, sse4.1, and sse4.2 intrinsics. At least, all the ones that can be safe wrapped.
• Some standard floating point utilities until more floating point math becomes part of core.

CI coverage: * Tested on: x86, x86_64, wasm * Built on: armv7, aarch64, thumbv7neon