[DATALAD RUNCMD] Convert the second image to greyscale

=== Do not change lines below ===
{
 "chain": [],
 "cmd": "python code/greyscale.py inputs/images/chinstrap_02.jpg outputs/images_greyscale/chinstrap_02_grey.jpg",
 "dsid": "8e1b38fe-172b-4a2b-8b2d-d872acbac4af",
 "exit": 0,
 "extra_inputs": [],
 "inputs": [],
 "outputs": [],
 "pwd": "."
}
^^^ Do not change lines above ^^^

outputs/images_greyscale/chinstrap_02_grey.jpg

@@ -0,0 +1 @@
+../../.git/annex/objects/Xw/QG/MD5E-s758181--54a6cebb4e99d985b1fa6c08b9c61815.jpg/MD5E-s758181--54a6cebb4e99d985b1fa6c08b9c61815.jpg