Trying something else for the freemarker errors

This time, I'm getting rid of the .class files altogether and adding freemarker in as a .jar file. If working in an IDE, you might have to add the jar to your classpath. When compiling/running, you can just tack on `-classpath ".:/path/to/project/src/freemarker.jar"` for linux or `-classpath ".;\path\to\project\src\freemarker.jar"` for windows.

If that works, I've got the Exporter finally tied into the UI. It opens up a Save dialog and saves current course to the chosen file.