[CGMZ] Animated Battle Backs - Version Alpha R7

Hi all, today this plugin was updated to version AlphaR7!
This version adds the option to set the battleback by troop id. This will override the map battleback if any is set. For example, if you always want troop id 2 to show your animated battle back with id video, you can now do that.
It also added some debug options with the option to use a specific animated battleback for battle or event tests.
- Add option to set battleback for battle / event test
- Add option to make certain troops always experience a specific battleback