add a handler for when a blank str is passed to Image constructor
add a handler for when a blank str is passed to Image constructor

tpltnt/SimpleCV,hayd/SimpleCV,jyt109/SimpleCV,gskielian/SimpleCV,sightmachine/SimpleCV,hayd/SimpleCV,nikhilgk/SimpleCV,tpltnt/SimpleCV,tpltnt/SimpleCV,hayd/SimpleCV,tpltnt/SimpleCV,sightmachine/SimpleCV,nikhilgk/SimpleCV,sightmachine/SimpleCV,nils-werner/SimpleCV,gskielian/SimpleCV,nils-werner/SimpleCV,nikhilgk/SimpleCV,nils-werner/SimpleCV,jlegendary/SimpleCV,gskielian/SimpleCV,jyt109/SimpleCV,sightmachine/SimpleCV,hurdlea/SimpleCV,beni55/SimpleCV,hurdlea/SimpleCV,tpltnt/SimpleCV,onaclovtech/SimpleCV,beni55/SimpleCV,onaclovtech/SimpleCV,jyt109/SimpleCV,onaclovtech/SimpleCV,hurdlea/SimpleCV,hayd/SimpleCV,onaclovtech/SimpleCV,jayrambhia/SimpleCV2,jyt109/SimpleCV,jlegendary/SimpleCV,jayrambhia/SimpleCV2,hurdlea/SimpleCV,beni55/SimpleCV,jlegendary/SimpleCV,nils-werner/SimpleCV,sightmachine/SimpleCV,nils-werner/SimpleCV,nikhilgk/SimpleCV,hayd/SimpleCV,sightmachine/SimpleCV2,jayrambhia/SimpleCV2,nikhilgk/SimpleCV,hurdlea/SimpleCV,beni55/SimpleCV,jayrambhia/SimpleCV2,jlegendary/SimpleCV,gskielian/SimpleCV,sightmachine/SimpleCV2,onaclovtech/SimpleCV,jyt109/SimpleCV,sightmachine/SimpleCV2,beni55/SimpleCV,gskielian/SimpleCV,sightmachine/SimpleCV2,jlegendary/SimpleCV