change buffer full event name
spinner: add draft plugin
disable jshint warning for single/double quotes
add authors, contributors and license
add license header on source files
add stats plugin draft (refs #15)
stats plugin: calculate rebuffering and startup time (refs #15)
stats plugin: add total watching time (refs #15)
core: prepare for asynchronous container creation
playback handler: add basic playlist handling
playback handler: create methods to process poster and resource url