Bunch of changes, adding functionality requested.

- Added bunch of achievements for democracy
- Added currency exchanges
- Made voting algorithm more efficient
- Added standard meeting hall functionality to the datapack

data/craftytable/advancements/joinmeeting.json

@@ -0,0 +1,24 @@
+{
+    "display": {
+        "title": {
+            "text": "Democracy!"
+        },
+        "description": {
+            "text": "Join a meeting! Saturdays at 8 PM BST.",
+            "color": "dark_green"
+        },
+        "icon": {
+            "item": "minecraft:paper"
+        },
+        "frame": "goal",
+        "show_toast": true,
+        "announce_to_chat": true,
+        "hidden": false
+    },
+    "criteria": {
+        "meetingjoin": {
+            "trigger": "minecraft:impossible"
+        }
+    },
+    "parent": "craftytable:root"
+}