Banks now use new scheme as well

- Implemented Bank Constructor object.
- Merged Pyramid object into common Bank class. Banks can now grant
spells as part of their reward.
- Move bank config code to config/objects/creatureBanks.json. Note: WoG
banks are not updated yet, should be moved to WoG mod.
- Updated AI code so it can correctly evaluate bank danger (should be
generic enough for use with other objects)
- New files JsonRandom.* that contain routines for loading random
objects from Json (still WiP but should be stable)

config/objects/generic.json

@@ -16,11 +16,6 @@
 
 	"blackMarket"					: { "index" :7,  "handler": "blackMarket" },
 
-	"crypt"							: { "index" :84, "handler": "bank" },
-	"shipwreck"						: { "index" :85, "handler": "bank" },
-	"derelictShip"					: { "index" :24, "handler": "bank" },
-	"dragonUtopia"					: { "index" :25, "handler": "bank" },
-
 	"pandoraBox"					: { "index" :6,  "handler": "pandora" },
 	"event"							: { "index" :26, "handler": "event" },
 
@@ -45,7 +40,6 @@
 	"magicWell"						: { "index" :49, "handler": "magicWell" },
 	"obelisk"						: { "index" :57, "handler": "obelisk" },
 	"oceanBottle"					: { "index" :59, "handler": "sign" },
-	"pyramid"						: { "index" :63, "handler": "pyramid" },
 	"scholar"						: { "index" :81, "handler": "scholar" },
 	"shipyard"						: { "index" :87, "handler": "shipyard" },
 	"sign"							: { "index" :91, "handler": "sign" },