Addressed some issues with the perf tests and added documentation.
Changed: pub/sub for perf is now push/pull.
Fixed: latency formula was flawed (showing 4x slower latency than reality).
Fixed: nextTick recursion.
Fixed: stylistic cleanups.
Merge pull request #220 from ronkorving/docs

Addressed some issues with the perf tests and added documentation.
Merge remote-tracking branch 'upstream/master' into race_condition