[CGMZ] Battle BGM Control - Version Alpha R2

Hi all, today this plugin was updated to version AlphaR2!

This update adds class themes. Now you can hear certain music depending on the classes of the actors participating in battle. This update also optimized the parsing of the themes, as before they were parsed at the beginning of every battle and now they are parsed only once at the beginning of the game.

This update fixed a bug with repeating music tracks. Before, duplicate tracks could occur and this would make certain bgms far more likely to play. This has been fixed, and now duplicates will be removed before choosing a bgm to play giving each track the same odds of being selected.

This plugin now warns when invalid JSON is detected in a plugin parameter. Invalid JSON is a result of incorrectly deleting a parameter or some other incorrect setup. These warnings are still important to fix, as they could cause the plugin to not load bgms correctly.

• Added class themes
• Fixed a bug where certain themes were more likely to play than others
• Optimized battle theme loading
• This plugin now warns instead of crashes when invalid json detected