(epoch) Beacon implementation without VDF.

[avive]

Next steps:

• Weak beacon with "Bad VRF" (owner @iddo333 )
• Finish analysis of King-Saia-based weak beacon to see if it's feasible (owner Marshall)

[rkasterstein]

1. First is write the Weak coin protocol and
2. suggest how to do a beacon following that - @iddo333 thinks this is doable