New PDFlib extension for PHP5

Hello, I'm maintaining the PDFlib wrapper code for the "pdf" extenions of PHP. I did a major rewrite of the wrapper for PDFlib 6 and PHP 5 and wanted to ask whether it is good idea to check in this code now (short before the release of PHP 5). My idea is to add this new Wrappercode as an extra module and keep the existing wrapper code for peoples using the old PDFlib 4 version. This is necessary because there are incompatible changes between PDFlib 4 and 5 which made a new wrapper module necessary. Here the details about the new wrapper code: This PDFlib Wrapper Code works with PDFlib 5 and higher. A new module was introduced, as PDFlib 5 supports a method to handle the special returnvalues needed for PHP in the PDFlib core now. This is necessary, as the new concept of optionlists in PDFlib allows to pass handles to PDFlib objects and filenames inside of optionlists. Before the wrapper added some offset to handles returned by PDFlib to fit into scheme used by php to return 0 in case of errors, whereas in PDFlib the errorcode is -1 and "0" is a valid handle. As the optionlist may contain filenames on various places the VIRTUAL_DIR support and the CHECK_OPEN_BASEDIR checks implemented in the wrapper will not work reliable too. So VIRTUAL_DIR support and the CHECK_OPEN_BASEDIR checking is disabled here too, as it would only work for some of the files used with PDFlib. The main changes: - only official PDFlib API's are included (exception pdf_open_memory_image) - supports PDFlib 5 and PDFlib 6 - builds with older PHP Version too (tested with PHP 4.1.0, 4.2.1, 4.3.0, and 5.0.0RC2.) - adds an Object Oriented API to PDFlib (for PHP 5 only) - uses PHP exceptions (for PHP 5 only) - disables VIRTUAL_DIR support (use SerachPath instead) - disables CHECK_OPEN_BASEDIR checks - changed old API's with varargs to only accept all args now I think it is worth to include this now, so that PHP5 comes with this new code, but I wanted to discuss this first.