Random number generation improvements

Minor improvements have been made to Qrack's random number generator API. Most importantly, 32 divisions have been replaced with 32 multiplications when generating a random float with Rand(). Another possible point of improvement is that most-significant bit of the raw random bit stream now corresponds with most-significant bit of Rand(), where some devices and services for random number generation will tend to prioritize most-significant bit as slightly less biased for randomness than least-significant.

Full Changelog: unitaryfund/qrack@vm6502q.v9.9.8...vm6502q.v9.9.9

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