staff -> admins

* rename everything containing staff back to admin (as requested by ryan i've renamed commands like slconfig to saconfig but left "slconfig" as an alias)
* format almost every file correctly
* a few other improvements

src/main/java/me/totalfreedom/totalfreedommod/bridge/EssentialsBridge.java

@@ -215,4 +215,4 @@ public class EssentialsBridge extends FreedomService
 
         return ess != null && ess.isEnabled();
     }
-}
+}