#31 Provide drop down of transforms

[David Berry]

CpoUtil should provide a user editing the attrbutes of a class with a list of transforms available on the classpath. The user should be able to manual add the transform class if the one they are looking for is not available in the drop-down.

CpoUtil will need to scan all the classes on the classpath. If a class implements the transform interface then it should be added to the list of available transforms.