[libvirt] Release of libvirt-php-0.5.2

After 5 months of development I'm more than proud to announce that libvirt-php-0.5.2 is out!It can be downloaded from http://libvirt.org/sources/php/libvirt-php-0.5.2.tar.gz This release focused on adapting to PHP7 and yet again some more bug fixes. The diff stat is rather big, but that's mostly because of all the documentation that has been added to PHP functions that we expose. I'd like to thank everybody who participated, namely Neal and Remi for proposing their patches and testing mine, Vasiliy for his valuable input. Lets make the next release even better! Michal