Portal sound effects + Improved skillbook drops

Added portal crossing sound effect on several scripted portals which were missing it.
Added a few more scrolls on Spindle.
Added several skill/mastery book drops, making "4th job skill questing" somewhat more viable.

scripts/portal/minar_elli.js

@@ -25,11 +25,11 @@ function enter(pi) {
         return false;
     } 
     if (pi.getPlayer().getMapId() == 240010100) {
-		pi.gainItem(4031346, -1);
-        pi.warp(101010000, "minar00");
+        pi.gainItem(4031346, -1);
+        pi.playPortalSound(); pi.warp(101010000, "minar00");
         return true;
     } else if (pi.getPlayer().getMapId() == 101010000) {
-		pi.gainItem(4031346, -1);
+        pi.gainItem(4031346, -1);
         pi.playPortalSound(); pi.warp(240010100, "elli00");
         return true;
     }