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/dev_main.py

@@ -4,4 +4,6 @@ import meta
 meta.logger.setLevel(logging.DEBUG)
 logging.getLogger("discord").setLevel(logging.INFO)
 
+from utils import interactive  # noqa
+
 import main  # noqa