update dependencies
remove neume.Random
fix gulp-istanbul hookRequire
fix dev tools
change NeuParam#set calls AudioParam#value setter only
add aliases of NeuParam interface
change NeuParam#update arguments order
add NeuUGen#add(value), NeuUGen#mul(value)
change util.defaults receive 3 arguments
add full name parameters
add NeuParam#value setter/getter
add $(delay) feedback attribute
change OscillatorNode use PeriodicWave

  - Firefox's Oscillator generates wave that is not same of WebKit's
update examples
add NeuSched
add tests for neume()
add tests for NeuContext
add NeuParam tests
add tests for NeuUGen
add test for Neume.render()