handle new soundcloud 302 json responses, was breaking url downloads.
Split 'common/' into commit 'a2fb31076d0327a68425accd0bc9a7e7eccfb962'

git-subtree-dir: common
git-subtree-mainline: 236c5d01b4596be06ae39533db1c882120edf2db
git-subtree-split: a2fb31076d0327a68425accd0bc9a7e7eccfb962