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.

wz/Item.wz/Etc/0400.img.xml

@@ -9642,6 +9642,7 @@
       </canvas>
       <int name="slotMax" value="200"/>
       <int name="price" value="1"/>
+      <int name="quest" value="1"/>
     </imgdir>
   </imgdir>
   <imgdir name="04001373">