release-520: Remove qtmacextras from the exclude list

qtmacextras is new candidate module for Qt 5.2.0

Change-Id: I68c29bd415e6e71074f948e5af37b26d84b48efb
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Ensure path format in URLs

When using urlparse.urljoin() make sure the base path ends with '/' or
the urljoin will chop out part from the URL string.

Change-Id: I1627da8479048d77ebf7fce89c4d30385a7824a9
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>