added stream.php module
TabularReader uses IStreamAdaptor interface
rewind() changes for IStream_Adaptor
Reader now implements key()
changed ReaderBuffer::flush() semantics and renamed to uflow()
ReaderBuffer rewinds its source reader on initialization
refactored ReaderBuffer
refactored Reader::filter()
modified EOF conventions for Readers and filters
ReaderBuffer::reader is now protected
using EofException to signal an EOF condition
Serial prefix changed to Serial_Core
moved source files to serial/core
added autoloading for library classes
PHP 5.2 fix for autoloader
workaround for s/printf() bug with NaN
FloatType::decode() works for NaN
refactored DataType hierarchy
removed serial/autoload.php
PHP 5.2 workaround for callable objects with Reader and Writer filters