creating new directory structure for compiled JS
Fixing slug.demo.json and demoserver.py so now demos work out of new location
Updating README to reflect new steps for test, demo, and production
removing unnecessary ref to application.js in slug.demo.json
Correction paths to JS build resources in demoserver.py
Adding empty js/ dir for audio demo
Adding readme for spectrogram example
Merge branch 'master' of github.com:ContinuumIO/bokehjs