Classes for safe data transfer (enhancements for pb.spread)

New submission from moonstruxx <None>:

These classes should help to transfer data blobs. The Baseclass are the Transferable and as the remote counterpart the RemoteTransferable. Subclasses are TransferableDictionary,TransferableString and TransferableList. It's possible to mix the datatypes. The client will receive a RemoteTransferable which has to be restored by it's .restore() function. The restore function returns the restored element. Exception will be raised if the data element of an unrestored RemoteTransferable is accessed. 

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Type     : enhancement
Component: pb
Keywords : 
Priority : normal
Nosy     : 
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http://twistedmatrix.com/trac/ticket/4046