- test for presence of test dataset
- if test data is not present writes it to tmp
- test data set is (180 /0.5) * (90 /0.5) polygons (each being .5 degree box)
- renders the dataset to an image and times how long it takes to do that
git-svn-id: http://svn.osgeo.org/qgis/trunk@7960 c8812cc2-4d05-0410-92ff-de0c093fc19c