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/evanGarden0.js

@@ -1,5 +1,5 @@
 function enter(pi) {
-	pi.playPortalSound();
+    pi.playPortalSound();
     pi.warp(100030200, "east00");
     return true;
 }