Don't copy empty directories to publish dir.
Don't copy empty directories to publish dir.

jacquesdeklerk/jacquesdeklerk,fady/ant-build-script,jacquesdeklerk/jacquesdeklerk,thetrickster/foundation-bc,h5bp/ant-build-script,scraperwiki/urchin-website,seanoshea/krissyoshea,thetrickster/foundation-bc,jacquesdeklerk/jacquesdeklerk,scraperwiki/urchin-website,thetrickster/foundation-bc,thetrickster/foundation-bc,firnny29-cts/helloworld1,seanoshea/krissyoshea,scraperwiki/urchin-website