Version/1.2.0 (#3)

* added relative ranking

* registering commands

* register commands

* made slash commands optional

* Update settings.py.example

* fix: bot joins

* fixed tests

* new database

* removed old code from helper tests

* variables for xp gain

* Update tests.py

* fix: leveling in afk cannel

* create directory if not existing

* little fixes

* added default font

* big refactor + negative levels

* search with at

* Create migrate-1-1-to-1-2.py

* moved migrate script

* renamed settings

* Delete register.py

Author: skillor