qgis-20: add back pyspatialite formula, until PyPi pyspatialite supports spatialite 4.x
qgis-20: add back pyspatialite formula, until PyPi pyspatialite supports spatialite 4.x

OSGeo/homebrew-osgeo4mac,OSGeo/homebrew-osgeo4mac,OSGeo/homebrew-osgeo4mac