[CGMZ] Light Effects - Version Beta R3

Hi all, today this plugin was updated to version BetaR3!
This update adds a z offset to lights, so you can now change their z values to get them to appear above or below other events, layers, or the player.
This update also fixes an oversight with the X and Y offsets, where they used to not allow for negative numbers. Now you can have negative x and y offsets too.
- Added Z offset to lights
- Fixed an issue preventing negative light x/y offsets