Remove Metrics.

I'd like to thank @Hidendra for his excellent work on the Metrics project. He has poured so much of his personal time and money into helping other developers, and I believe that I speak for many people when I say I very much appreciate his devotion. Thank you!
Begin work on Enterprise

AntiCheat Enterprise is a powerful new system to allow owners of large servers to efficiently run the plugin on their networks. I've ended the commit here because there are significant changes to the configuration methods I'd like to revise before continuing with development.