Issue Management System

This release adds support to include and download multiple attachments to tickets.
To run the application, execute the command;

java -jar <jar filename> --spring.mail.username=<your email server username> --spring.mail.password=<your mail server password> --spring.datasource.url=<your database url> --spring.datasource.pusername=<your database username> --spring.datasource.password=<your database password>