Recursive downloader for shared content from Amazon Cloud Drive.
acd-dl [-debug] ID [ID [ID ... ]]
IDs are the alphanumeric identifier present in the share URL, so https://www.amazon.com/clouddrive/share/XXXXXXXXXXXXXXXXX222222222222XXXXXXXXXX?ref_=cd_ph_share_link_copy would yield an id of XXXXXXXXXXXXXXXXX222222222222XXXXXXXXXX.