A Muslim woman who alleges Chicago police threw her to the ground and ripped off her headscarf and veil has been given the go-ahead to pursue a civil rights claim against the city.In a written opinion Friday, U.S. District Judge John Robert Blakey did not rule on the merits of Itemid Al Matar’s allegation that officers attacked her without cause in violation of her right to freedom of religious expression.Blakey also did not rule on Al Matar’s contention that the city is liable for any damages she is awarded …