Remove user-independent date and time functions from Phabricator

Summary: These have been moved into libphutil.

Test Plan: Browsed Phabricator, didn't see a crash.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9907
Fix issue in Mercurial repos with duplicate branch heads

Summary:
Fixes T5613. A branch may have multiple heads in Mercurial, but `executeOne()` expects exactly one result.

Load them all instead. Equivalently, we could `limit(1)`, but it's likely that we'll use the cursors in the future to reduce the number of VCS operations we do, so this is probably a little more along the lines where we're headed.

Test Plan: Poked around some repos.

Reviewers: chad, richardvanvelzen

Reviewed By: richardvanvelzen

Subscribers: epriestley

Maniphest Tasks: T5613

Differential Revision: https://secure.phabricator.com/D9918
Update Phortune UI elements

Summary:
Ref T2787. Update some of the UI elements used by Phortune. Mostly gets rid of the old blue headers.

Also adds some sweet art.

Test Plan: Poked aroudn Phortune.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Maniphest Tasks: T2787

Differential Revision: https://secure.phabricator.com/D9915
Update Stripe PHP API

Summary: Ref T2787. This brings us up to date.

Test Plan: `git clone`

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Maniphest Tasks: T2787

Differential Revision: https://secure.phabricator.com/D9916
Add 4 more project icons

Summary: Adds 4 more icons.

Test Plan: Tested editing a project

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9919
Use `phutil_var_export` in `CelerityManagementMapWorkflow`

Summary: `phutil_var_export` produces more readable output than `var_export`. Depends on D9923.

Test Plan: Eye-balled the Celerity map.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9926
Return repositoryPHID from differential.query

Test Plan: Queried a revision that had a repository attached, got the PHID; queried one that didn't, got null.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9928
Merge remote-tracking branch 'upstream/master'