Now only one instance of Tick() can run at a time
Add MessageSender to state struct and CreateState
organization
Merge branch 'master' of github.com:Siacoin/Sia into communication
resolve merge conflict
test heartbeat marshalling
switch AddParticipant to accepting a participant object
added ZeroNetwork to common, a dud network
change participants and add non-nil network objects
adjust how heartbeat announcements get made
touch up testing
added and tested SignedHeartbeat marshalling
add message handling for SignedHeartbeat
start a main, which will contain the demo
Merge branch 'node' of github.com:lukechampine/Sia into communication
migrate quorum to fit Luke's changes
Merge pull request #76 from DavidVorick/communication

Finish Basic Quorum
Readme: New 'What is Sia' and 'Sia Economic Model'
Update README.md
Readme: Add 'The Sia Company'