Added temporary playground page for testing the new Player API
Switch speed up/down shortcuts to use the numberpad for cross browser compatibility
Added cancel() to Player
Added player seeking shortcut
Made logging togglable and added additional log targets
Updated playing attribute to match spec more closely (has weird dependency on paused state)
Added player.finish() shortcut
Added _pauseTimeLag logging
Added nullifiy pause time step to seek method
Merge pull request #500 from alancutter/newPlayerAPI

New Player API: Add extra step to seek method