Aa-discord-ping-formatter

Changed
- Minimum AA version set to 2.7.4 since we use a feature that was introduced in this version. So make sure to update your Alliance Auth before testing this app.

Fixed
- Using Python 3 style `super()` without arguments
- Import order

Removed
- template tags since they are no longer needed

Changed
- Groups for PingTargets can now be selected via drop down in admin and the respective Discord group_id is assigned automatically. **!! IMPORTANT !!** In case you already defined PingTargets in v2.0.0a1, you have to remove them before migrating.

Added
- Support for pings to Slack. If you're using Slack, add ``AA_FLEETPINGFORMATTER_USE_SLACK = True`` to your `local.py`

Changed
- **!! breaking change !!** Settings are no longer in your `local.py`. You find them now in your admin backend. Which means. after updating to this version, you _have_ to re-do you setting in the admin backend of Auth.

Fixed
- Little logic error in embedded prepings when no FC is set

Fixed
- Single quote issue finally fixed (31)