Core 4 - better commands and updater

Reworked the whole Core Commands API. You can now specify arguments that are required as function parameters. Multiple arguments count can be counted for by using array of functions with different parameter count. Look at some examples to learn how it works.

Core Updater now prints last commit information in update dialogs.
Added multiple functions: isObject, getFunctionParameters, downloadDirectory, Array.toLowerCase, Array.flat
ClickGui hooking separated into Core.updateClickGui. You can use it to refresh ClickGui while keeping events such as onClickGuiLoaded working.
Fixed a possible bug that could prevent core.log from being removed and therefore break Core Updater.