Generics and FSIndex

[Jörn Kottmann]

Hello,

right now every FSIndex uses FeatureStructure as the generics parameter for
the Iterator it can provide. That means that the AnnoationIndex also 
must provide
an FeatureStructure Iterator and not an AnnotationFS Iterator which 
would be much
nicer in client code.
I would like to suggest to change the generic parameter of the Iterator to
? extends FeatureStructure, then AnnotationIndex can reduce it to 
AnnotationFS.

Would do others think ?

Jörn