add more stream functionality

putting all stream stuff in the stream package.  We will deprecate
all of the Iterator and Writer api.  It was too complicated,
this is much, much simpler.  We still need to add toBean method and
migrate new streams for xml, csv, delimited and sql.  We will call
these 'streams' instead of iterators.
finish stream api

also migrated some of the iterators to the stream api
finish stream migration

all useful iterators have been transfered to the stream api
deprecate iterators and writers

we are now pushing the stream api now
Merge pull request #124 from metridoc/stream-addons

Stream addons