Including a sample trace panel/alert log

This is a set of classes for an alert log and corresponding console display panel that I wrote for my factory project in CS 201.  They're handy classes, so I'd like to include them in the sample code for students.  Especially since it would otherwise be a nightmare to look through their console System.out print statements.  The TracePanel includes some color formatting, and most importantly, the ability to filter the logs (eg. only see warnings and errors, or only see bank teller role messages, etc.).  I have my own simple demo class that has some code morked as TUTORIAL for instructional purposes, and then I also incorporated it into the existing city demo.  There isn't a separate readme, but the code is well documented, and the DemoLauncher code has some marked tutorial information, so it should be fine.  I can write up a readme later if you'd like.