Add hit dice to each class's JSON def

resources/classes/Bard.json

@@ -1,5 +1,6 @@
 {
   "name":"Bard",
+  "hitDice":6,
   "bab":"AVERAGE",
   "fort":"POOR",
   "ref":"GOOD",

resources/classes/Cleric.json

@@ -1,5 +1,6 @@
 {
   "name":"Cleric",
+  "hitDice":8,
   "bab":"AVERAGE",
   "fort":"GOOD",
   "ref":"POOR",

resources/classes/Druid.json

@@ -1,5 +1,6 @@
 {
   "name":"Druid",
+  "hitDice":8,
   "bab":"AVERAGE",
   "fort":"GOOD",
   "ref":"POOR",

resources/classes/Wizard.json

@@ -1,5 +1,6 @@
 {
   "name":"Wizard",
+  "hitDice":4,
   "bab":"POOR",
   "fort":"POOR",
   "ref":"POOR",