Message2439

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This patch needs to be broken up into smaller units of work.

Please separate the changes for PyDictionary and Iterator
into two separate patches.  Also, please complete the
implementation of all Iterator methods before submitting the
patch.  It's not acceptable for hasNext() to return true
without regard to the actual state of the iterator.

Please also use cvs diff to submit the patch as a diff file.
 It's much easier to manage and it allows for a simpler upload.