added support for few bzip2/zlib functions

--HG--
branch : phar
fix bzip2
Add PHPT tests from PHP-5.4.33 for bz2 and zlib
Configure bz2 and zlib tests
Fix translation and make bz2 more robust
Merge pull request #76 from rlamy/bz2

Incomplete implementations of extensions bz2 and zlib