Addresses issue # 57

When using gfv1.1 simple geometries as the target geometry, there was an error due to the fact that the reprojected geometries, for weight calculation, were not valid. In general, this dataset contains ~9000 invalid geometries. Previously the geometries were validated prior to calculating the intersections, but upon reprojeting, some of the fixed geometries became invalid again. So reconfigured the tests, and positioning of the checks for validating and reprojecting the geometries.