when clean is called also clean up staging dirs (./dist and ./staging)
when clean is called also clean up staging dirs (./dist and ./staging)

tschulte/griffon,shemnon/griffon,codehaus/griffon-git,shemnon/griffon,levymoreira/griffon,griffon/griffon,breskeby/griffon,codehaus/griffon-git,tschulte/griffon,levymoreira/griffon,levymoreira/griffon,breskeby/griffon,shemnon/griffon,tschulte/griffon,griffon/griffon