Add 'shared/' from commit 'a473381b79d333ac3f93a4356e597dcd32c1c5c0'

git-subtree-dir: shared
git-subtree-mainline: 176106e583b68c8de1d5670b3d8536e797c04068
git-subtree-split: a473381b79d333ac3f93a4356e597dcd32c1c5c0