[CGMZ] Self Variables - Version Beta R4

Hi all, today this plugin was updated to version BetaR4!

This version adds map variables and switches. These are a new type of switch and variable, which are a halfway step between global switches or variables and self switches or variables. Events on the same map will be able to read the same map variable or switch, but events on other map ids will have their own copies of these variables or switches.

This could be useful if you have dungeon maps that require a switch to be ON to open the final boss door, your switch can be a Map Switch and then your switch event can turn the map switch ON and your door can check the map switch, and these can be re-used throughout all of your dungeons instead of needing separate switches for each dungeon.

• Added map variables and switches