Put some crumbs on some project pages

Summary: Ref T10010. This is primarily to make "Parent > Child > Grandchild" navigation more manageable for subprojects, at least for now.

Test Plan: Viewed profile, members, feed; saw crumbs.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10010

Differential Revision: https://secure.phabricator.com/D14891