Jazz v1.3, improved timer setup code

4th April 2013
Changes to Assistant Performer (web version)
a) Updated it for use with v1.3 of the Jazz plugin.
b) Included Chris Wilson's code for setting up the correct timer in various browsers.
According to Chris, this code 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.
This update fixed a serious bug:
The previous version was not working at all because I hadn't taken full account of the new functions in Jazz v1.2! Took this chance to update to Jazz v1.3.