Update Conpherence CSS

Summary:
Updates Conpherence CSS for mostly responsive design. Notably:
- Clipped nav 20px
- Clipped widgets 40px
- Tested tablet and phone layouts
- Phone layout mostly done.
- Bouncy webkit scroll areas.

Still more work to do, but I think it should be easy now for Bob to lay in the rest of mobile. It probably doesn't need to render the menu and conversation in the widget area, as I think we can now credibly position: fix it in mobile. Not completely sold on tablet layout, but it's still better than current.

Test Plan: Tested layouts on iPhone and iPad simulator.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2421

Differential Revision: https://secure.phabricator.com/D5442
Add Apple Touch Icon.

Summary: Adds an icon if you add Phabricator as a web app on your iPhone.

Test Plan: Test on simulator and in iOS.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5444
Tighten up CSS on object-list a bit.

Summary:
- Fix unintended round edges.
- Reduce height 4px;
- Align title and date
- Fix mobile/tablet spacing

Test Plan: Photoshop, UIExamples, Config, Paste, Maniphests (all mobile and desktop views)

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5445
Merge branch 'master' of github.com:facebook/phabricator