First release of the code.

Main script: Multi_Package_Manager.sh
Dependency for the main script (partially manages the Yubico package) (Optional file): install-yubico-authenticator.sh
Configuration file (Optional file): mpm.conf
File containing the checksum for both .sh files (Optional file): SHA256SUMS
File containing a set of commands to test the script's functionality (Optional file): command_for_massive_test.txt