Wavelore Instruments updates American Zither to v1.1

Wavelore Instruments has updated American Zither to v1.1. This patch contains the GVI engine update to v3.63, as well as four versatile small hand drum instruments.

Change summary:

• GVI engine updated to v3.63.
• Free Wavelore Slide Whistle included (hitherto available only as a GS3/GVI instrument) in the WLAZ interface. Just load it from the same menu as the Zither. If anyone (WLAZ user or not) is interested in this instrument, it can be downloaded here.
• A gift, reserved exclusively for American Zither users, Four small hand drums: Small Darbuka, Smaller Darbuka, Small Bongo, Smaller Bongo. These instruments use 8-16 way round robin for repetitions, and the DEF filter in velocity-sensitive mode for morphing of the round robin samples through a continuous range of dynamics.