* Code updates for Wwise 2021.1.X support.
* [WIP] CMake updates for Wwise 2021.1.X support.
* Updates FindWwise.cmake to search for a Wwise install or let user set it as cache variable.
* Makes Wwise SDK optional, and the AudioEngineWwise Gem will revert to a 'stub' build if no SDK found.
* Adding a .gitignore for Wwise project files.
* Updates a .wcmdline file for integration into Wwise projects.
* Updates the cmake messaging regarding Wwise SDK and smooths out some of configuration scenarios.
* Updates the Wwise project for AutomatedTesting to ver 2021.1.1.7601 and rebuilds banks.
Steve Pham
Eric Phister
Esteban Papp
Brian Herrera
alexpete