Update README_WKHTMLTOPDF

Fixed wkhtmltopdf-qt url

Author: peterrehm

README_WKHTMLTOPDF

@@ -449,7 +449,7 @@ named differently.
 
 First you must check out the modified version of QT
 
-git clone git://gitorious.org/+wkhtml2pdf/qt/wkhtmltopdf-qt.git wkhtmltopdf-qt
+git clone git://gitorious.org/~antialize/qt/antializes-qt.git wkhtmltopdf-qt
 Next you must configure, compile and install QT, note this will take quite some
 time, depending on what arguments you use to configure qt