Errors must be thrown for negative or non-finite values for the time
and/or duration.
Correct typo.
Change INVALID_STATE_ERR to INVALID_ACCESS_ERR.
Merge branch 'rtoy-negative-time-errors' of https://github.com/rtoy/web-audio-api into rtoy-rtoy-negative-time-errors

Conflicts:
	index.html
Merge branch 'rtoy-rtoy-negative-time-errors' into gh-pages