03 Apr 2003
- Added SourceModel.add(SourceModel) method
- Added SourceModel.getSource(Statement) method
- Fixed bug in Source.equals(Object)
- createSource(String) will now return an existing source if one
already exists in the model.  Otherwise a new Source is created.
- listSources() no longer returns Sources with no statements.

26 Mar 2003
-Initial Release