Core user data and leaderboard commands.

Added flexibility to data `update_where`.
Added interactive utils, with improved pager.
Added user data table, with caching and transactional interface.
Added `topcoins` command to `Economy`
Added `top` command to `Study`

bot/utils/lib.py

@@ -441,3 +441,12 @@ def jumpto(guildid: int, channeldid: int, messageid: int):
         channeldid,
         messageid
     )
+
+
+class DotDict(dict):
+    """
+    Dict-type allowing dot access to keys.
+    """
+    __getattr__ = dict.get
+    __setattr__ = dict.__setitem__
+    __delattr__ = dict.__delitem__