Aphid rebalance

Aphids can no longer be tamed. Aphids morale and agression are lowered. I'd given them the fear trigger PLAYER_CLOSE and set their morale regen to true.

data/json/monsters/insect_spider.json

@@ -1862,7 +1862,7 @@
     "id": "mon_aphid",
     "type": "MONSTER",
     "name": { "str": "giant aphid" },
-    "description": "A green aphid about the size of a rabbit.  It is constantly searching for plants to suck from.  You could probably sate it for a moment with cattle fodder.",
+    "description": "A green aphid about the size of a rabbit.  It is constantly searching for plants to suck from.",
     "default_faction": "ant",
     "bodytype": "insect",
     "species": [ "INSECT" ],
@@ -1873,8 +1873,8 @@
     "material": [ "iflesh" ],
     "symbol": "a",
     "color": "light_green",
-    "morale": 20,
-    "aggression": -40,
+    "morale": 10,
+    "aggression": -90,
     "melee_skill": 1,
     "melee_dice": 1,
     "melee_dice_sides": 2,
@@ -1886,13 +1886,14 @@
     "vision_day": 10,
     "vision_night": 5,
     "harvest": "arachnid",
-    "fear_triggers": [ "FRIEND_ATTACKED", "FRIEND_DIED", "HURT", "FIRE" ],
+    "regen_morale": true,
+    "fear_triggers": [ "FRIEND_ATTACKED", "FRIEND_DIED", "HURT", "FIRE", "PLAYER_CLOSE" ],
     "death_function": [ "NORMAL" ],
     "special_attacks": [ [ "EAT_FOOD", 60 ], [ "EAT_CROP", 80 ] ],
     "reproduction": { "baby_monster": "mon_aphid", "baby_count": 1, "baby_timer": 20 },
     "baby_flags": [ "SPRING", "SUMMER"],
     "biosignature": { "biosig_item": "honeydew", "biosig_timer": 600 },
-    "flags": [ "SEES", "HEARS", "SMELLS", "CLIMBS", "PATH_AVOID_FIRE", "PATH_AVOID_FALL", "CATTLEFODDER", "PET_WONT_FOLLOW" ]
+    "flags": [ "SEES", "HEARS", "SMELLS", "CLIMBS", "PATH_AVOID_FIRE", "PATH_AVOID_FALL" ]
   },
   {
     "id": "mon_mantis_small",