remove print statements from non-main code
make Compile() thread safe
add network support for messages of any length
add Close() method to TCPServer
thread safety for HandleSignedHeartbeat
Merge branch 'node' of github.com:lukechampine/Sia into concurrency
swich many public values to being private values
Merge branch 'race' into concurrency
Fix main and testing
fix threading issues
Merge branch 'master' into concurrency
merge luke's code
Merge pull request #82 from DavidVorick/concurrency

Fix Concurrency Issues
add SendFile()
add test for SendFile()