Multi-Algo

As @wjm mentioned in the AMA, we have a solution that supports different mining algorithms being used concurrently on different chains. It's an exciting approach that fits very naturally into Chainweb's concurrent and distributed POW consensus algorithm. It is still active research and work in progress. We won't be deploying this onto Mainnet until we are absolutely certain that it is secure and behaves as expected. This work isn't related to particular algorithms.