Updated limitations and code comments.

Signed-off-by: Lanny McNie <lanny@gskinner.com>
Changed looping behaviour to use native browser looping instead of manual looping to address noticeable loop delays

Signed-off-by: Lanny McNie <lanny@gskinner.com>
Added better support for looping in webaudio.

Signed-off-by: Lanny McNie <lanny@gskinner.com>
Updated docs and libs.

Signed-off-by: Lanny McNie <lanny@gskinner.com>