Update on Release Phoenix

Release Phoenix is a go!

I've successfully competed testing of:

1. New PoW
2. Block time switch to 4 minutes
3. Difficulty transition adjustment (prevents blocks from being mined too fast after switching to faster PoW)

I will be announcing a test release shortly, so people can try building and running on your own systems (it is set up to run separately from the main network).

Assuming no problems with the test release I will then push out a new general release with the hard fork set at some block in the future and a few other minor improvements.