Nonce distribution

The pre and post nonce are values in a Munt block header that are repeatedly modified by SIGMA miners during the process of attempting to find a valid block to add to the chain. Values can range between 0 and 65536. Due to the nature in which SIGMA works, the post-nonce is expected to have a random distribution. The pre-nonce is also expected to have a random distribution, however with a heavy bias toward lower numbers.