Implement statejoin & fix related bugs
Merge pull request #43 from c00w/join

Implement statejoin & fix related bugs
Mock out record interface inside of heartbeats
Merge branch 'master' of github.com:Siacoin/Sia
Merge pull request #49 from c00w/records

Mock out record interface inside of heartbeats
Merge branch 'master' of github.com:Siacoin/Sia