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/strings/special-contexts.txt

@@ -5,7 +5,7 @@ Looking (Outdoors)
 Looking (Town/Combat)
 Entering town
 Leaving town
-Talking
+In conversation
 Using special item
 Town event timer triggered
 Scenario event timer triggered
@@ -21,4 +21,5 @@ Monster using special ability
 Attacking at melee
 Being attacked at melee
 Attacking at range
-Being attacked at range
+Being attacked at range
+Initiating conversation