Exta email notification from zabbix

Script for pretty formated email from zabbix-server, with graph. Used adaptive mail template HTMLemail.

1. Install python3.
2. Install python extensions:
   • pip install jinja2
   • pip install requests
3. Create Zabbix read-only user for api.
4. Configure zbx_ex_setting.py (see zbx_ex_setting.example.py for expample).
5. Put scripts to zabbix_alert_script directory.
6. Configure Zabbix, then he used this script for sending notifications.