Changes to OFDictionary, OFIterator and OFList - see details.

OFDictionary:
 * More optimized way to internally store the data.
 * Faster resizing of dictionaries (no rehashing anymore).

OFIterator:
 * Return a key/object pair rather than first the key and then the
   object.

OFList:
 * Support for list objects with a different size so you can have your
   own list object structs.