Cataclysm x YUNG's Better Nether Fortresses Compat

Allows L_Ender's Cataclysm's Ignited Berserkers to spawn in YUNG's Better Nether Fortresses after defeating Ignis, creating compatibility between the two mods.

(This is done by simply adding the Better Fortress structure to Cataclysm's "#berserker_spawn" tag)

Of course, requires L_Ender's Cataclysm, YUNG's Better Nether Fortresses, and their dependencies.