added missing objects for php 5.4 compatibility 


git-svn-id: https://svn.muze.nl/svn/ariadne-php5/trunk@5602 7882d7ee-46e0-0310-a255-a28a61b628e4
added webkit2png to installer scripts

git-svn-id: https://svn.muze.nl/svn/ariadne-php5/trunk@5603 7882d7ee-46e0-0310-a255-a28a61b628e4