- Added a simple bank system. Users can deposit, withdraw and check the balance of their currency in the bank.

- Users can't check other user's bank balances.
- Added a button on a .$ command which, when clicked, sends you a message with your bank balance that only you can see.
- Updated pagination, it now uses buttons instead of reactions
- using .h <command group> (atm only .bank is a proper group) will list commands with their descriptions in that group

src/NadekoBot/data/strings/responses/responses.en-US.json

@@ -993,5 +993,10 @@
   "medusa_unloaded": "Medusa {0} has been unloaded.",
   "medusa_empty": "Medusa wasn't loaded as it didn't contain any Sneks.",
   "medusa_already_loaded": "Medusa {0} is already loaded",
-  "medusa_invalid_not_found": "Medusa with that name wasn't found or the file was invalid"
+  "medusa_invalid_not_found": "Medusa with that name wasn't found or the file was invalid",
+  "bank_balance": "You have {0} in your bank account.",
+  "bank_deposited": "You deposited {0} to your bank account.",
+  "bank_withdrew": "You withdrew {0} from your bank account.",
+  "bank_withdraw_insuff": "You don't have sufficient {0} in your bank account.",
+  "cmd_group_commands": "'{0}' command group" 
 }