Second-generation KS releases

Because the API was having mixed code of between refactored and unrefactored, we would like to release the second-generation Kernel Simulator to celebrate the end of Alpha stage of this kernel, as well as the new "beta" version of our kernel.

Please note that the API that the second-generation KS has will not be backwards-compatible with the first-generation API, so we urge all mod and screensaver developers to update their mod to fully support second-generation and optionally provide the first-generation version.

Meanwhile, we plan to keep supporting the first generation KS until 2024.