There is some usefull stuff in JScheme that was not imported to Jscm yet. Go trough the source and see what could useful and whose use is allowed by their license. Create issues for adding them.
There are some .scm files in the project already. Some are actually missing, and need to be added from JScheme. Those should not be distributed alongside the java files, but should go into their own directories in accordance with the standard directory layout provided by maven.