Another round of refactoring has been conducted to improve the structure of Tuskfish and to make it easier to read and to test. No new functionality has been added.

Changelog:

• The larger methods have been broken down into smaller logical components, to make the code more readable and easier to test.
• Implemented an admin controller class to clean up the admin controller script and allow reuse for common operations.
• Extended bad login count and retry delay to the two-factor Yubikey version of the login script.
• Converted rights to a trait to allow for reuse across system.
• Error messages have been improved to give a more precise indication of what went wrong.