Demo files for 'Unravelling Threads In Node.js' presentation at NYC Node.js

1. server.js is a demo of how cpu-intensive tasks can block the main thread
2. workerThreads.js is a demo of the new worker_threads module in Node.js (make sure you have a recent version of Node.js)
3. blockingDemo.js and blockingDemoWithCluster.js are demonstrations of child processes, with fibInRange.js serving as a sample CPU-intensive operation