Some code tidying + support of clipRect in multi-screenshot config
Some code tidying + support of clipRect in multi-screenshot config

tpgmartin/PhantomCSS,istr/PhantomCSS,aeharding/PhantomCSS,aeharding/PhantomCSS,gdseller/PhantomCSS,smrq/PhantomCSS,tazminweb/PhantomCSS,Huddle/PhantomCSS,gdseller/PhantomCSS,istr/PhantomCSS,tazminweb/PhantomCSS,Huddle/PhantomCSS,tpgmartin/PhantomCSS,shakyShane/css-reg-test,smrq/PhantomCSS,shakyShane/css-reg-test