Change Fatal and add SetOutput

Fatal functions and methods now automatically print the stored events
after the fatal event. SetOutput added, it changes where events are
printed to (such as a file or stderr). Also, all setters now wait for
all pending events to be handled before changing the behavior of the
PriorityLog.
Document the log package.
Privatize claim and unclaim in log
Remove newline causing issues with Godoc
add functions to allow host communication over tcp
add godoc comments
go fmt
entirely cosmetic
Merge pull request #61 from lukechampine/node

Network communication
Merge pull request #59 from Jonbeek/Log

Documentation for the Log and more