Add description of ``ensure-dirs`` key in upgrading
Add description of ``ensure-dirs`` key in upgrading

rrader/vagga,joehillen/vagga,tailhook/vagga,tailhook/vagga,popravich/vagga,tailhook/vagga,joehillen/vagga,popravich/vagga,rrader/vagga,joehillen/vagga,KaminoDice/vagga,KaminoDice/vagga,KaminoDice/vagga,popravich/vagga,popravich/vagga,joehillen/vagga,rrader/vagga,tailhook/vagga