Bug fixes

• Undergoing pareview.sh; Deleted LICENSE.txt; Unused variable $config, $output_d, $output_t, $host.
• Fixing EventSubscriber Firewall between white and buffer.
• Adding service injection into mailController.

Add secondary checksum for GST number

Please see UPDATE.md file in the Droopler directory for migration instructions.

This release includes:

• RequeueException causing endless cron runs

Some improvements for the option

- Fixed two security issues related to transaction edition
- Implemented part of the /transactions endpoint of the komunitin accounting protocol API (read, create, delete).