Improves Restler, to have getRequestStream method to non destructively read php://input
iDecodeStream, new interface for formats that are capable of decoding input streams
Improves Restler to use stream decoding when the request format supports iDecodeStream
Improves Restler to make sure the stream is not false before attempting to parse it
Improves CsvFormat to support stream decoding by implementing iDecodeStream
Improves Scope to include CsvFormat
request data test is modified to include CSV format support