reset entropy to being a one stage process
Merge branch 'master' of github.com:Siacoin/Sia into demofix
Merge pull request #113 from DavidVorick/demofix

Remove 2 stage entropy
Merge pull request #112 from lukechampine/rpc

Changes to Ring
Break state into quorum and participant

The old 'participant' got renamed to 'Sibling'
the new participant contains information that is only held by that one
participant.
The new quorum contains information that is held by all siblings in a
quorum.
Merge pull request #115 from DavidVorick/stateSplit

Break state into quorum and participant
add timeout to SendMessage
add timeout to SendAsyncMessage
add timeout tests