Replace stream_printf with php_stream_printf for PHP 5.5
Merge pull request #5 from edorian/master

Fix "undefined symbol: stream_printf" for PHP 5.5
Add another env to "Compatibility" section
Merge pull request #6 from edorian/patch-1

Add "PHP 5.5 on Ubuntu 12.04" env to "Compatibility" section
Merge branch 'master' into object_refcount

Conflicts:
	meminfo.c