CWSM Enhancements

re-added Wither Storm boss musics, themes are now from the upgraded seperate uploads by Antimo & Welles, affects default theme, rises theme and destroyed theme

changed Wither Storm revive theme to "101 Credits"

implemented old Withered Symbiont boss music before Mar Mar's version came in; people who want the old Symbiont fight music back, please download version 3-A. people who want to keep Mar Mar's symbiont music, please download version 3-B.