Implement a quest system and job board

- The job board is loosely based on Exile III's job board; the dialog is converted from the one contained as a relic of E3 in BoE
- Quest system is loosely based on a mix of Exile III jobs and Blades of Avernum quests
- Talking to a monster (even a hostile one) can now trigger an arbitrary special node

Dialog engine:
- LED's now support wrapped labels

rsrc/schemas/dialog.xsd

@@ -242,6 +242,7 @@
           </xs:attribute>
           <xs:attributeGroup ref="rect"/>
           <xs:attributeGroup ref="font"/>
+          <xs:attribute name="wrap" default="false" type="bool"/>
         </xs:extension>
       </xs:simpleContent>
     </xs:complexType>