Updated for Jazz Plugin v1.3

The previous published version was not working with Jazz v1.2!
Changes include correctly opening input and output devices.
Included Chris Wilson's code for polyfilling window.performance.now()

According to Chris, this should work on Chrome, Firefox, Safari, Opera
and IE. I have not tested my other code on non-Chrome browsers, but
have hopes that it should also work there. I don't use any very advanced
Jazz features.
Updated the copyright notice in MIDILibOverview.txt