Fixes issue #24: don't fail deleting non-existent directory.
Fixes issue #24: don't fail deleting non-existent directory.

codyopel/collide,PP888/collide,Letractively/collide,PP888/collide,Letractively/collide,PP888/collide,codyopel/collide,ericmckean/collide,ericmckean/collide,ericmckean/collide,codyopel/collide,Letractively/collide,Letractively/collide,ericmckean/collide,codyopel/collide,PP888/collide