Put feed on project home, move history to a separate page

Summary:
Ref T10054. This shuffles some stuff around to move us closer to mocks in M1450 in terms of what information is on which pages.

Home now has feed, members, watchers, link to "edit project / project edit history".

History now has edit history, edit details, edit picture, archive/unarchive.

Test Plan:
New home page:

{F1064889}

New edit/history page:

{F1064890}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10054

Differential Revision: https://secure.phabricator.com/D15060