Shared build and php5.5(/trunk)

You can build it now as a shared extension and use it with php versions newer than http://lxr.php.net/diff/PHP_TRUNK/Zend/zend_compile.h?r2=%2FPHP_TRUNK%2FZend%2Fzend_compile.h%407651d64556ebe223261c73325620c9d4b8d68aff&r1=%2FPHP_TRUNK%2FZend%2Fzend_compile.h%4070f83f35d089d0cafae12ae231a38541f5c8e41c .