The problem with the Sevrin Core build script was that I upgraded Ant and it decided to compile all of the classes twice. A simple classpath fix.
Note for those of you who are interested in running Sevrin Web Stack: it is not well documented. It's not hard to understand, but it may take some work.
The Web Stack itself will attempt to auto-configure itself. If you install it in Tomcat, for instance, and then load it in your browser, it will ask for configuration data. For security purposes, you will be required to enter a randomly generated password located in a protected file on the server. The absolute path will be given to you on the screen to find this password file.
Just be sure to create a database in MySQL and table creation rights to a specific user for the Sevrin database. It should create everything for you. After it is complete, restart the application (or the server itself) and it should load fine. (And yes, you can use this same mechanism to auto-configure your own applications based on the Web Stack. :)
