Improve Herald commit emails

Summary:
  - Show the canonical (i.e., shorter) commit identifier in the subject.
  - For commits without a revision, put the commit summary in the subject.

Test Plan: Ran "scripts/repository/reparse.php <commit> --herald" for a number of different commits (with revision, without revision); got more useful email subjects.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T1028

Differential Revision: https://secure.phabricator.com/D2004
With the {F...} syntax, render non-images as links

Summary:
We render a huge picture of a PDF for PDFs right now, etc. This is hella dumb.

Also allow users to force this rendering style, and change the link name.

Test Plan: Uploaded image and non-image files, used layout=link and name=....

Reviewers: btrahan

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T1040

Differential Revision: https://secure.phabricator.com/D2006
Show merged changes in commit views for merges

Summary:
When a commit is a merge, show what it merged.

Also fix some bugs:

  - Mercurial queries may contain ":", but mercurial rev ranges may also contain ":". A rev range with a branch that has a ":" in it is ambigiuous, e.g. branch "a:b" might appear in a rev range like "a:b:0", which can not be parsed. Use stable commit names instead.
  - Mercurial stable commit name implementation was broken, fix it.
  - Extend DiffusionHistoryQuery from DiffusionQuery to share code.
  - Fix a bug where Mercurial's main browse list would not show the most recent commit if it was a merge commit.

Test Plan: Generated a bunch of mercurial/git merge commits and looked at them, they seemed to accurately represent the repository state.

Reviewers: btrahan, Makinde

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T961

Differential Revision: https://secure.phabricator.com/D2005
do not re-use output when an exception occurs

Summary:
$stdout from the previous run would be reused if an exception
occurred

Test Plan: that's a negative, ghostrider.

Reviewers: epriestley, jungejason

Reviewed By: epriestley

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D2008
Render pretty graphical traces for commit branches, etc

Summary: I AM A WIZARD

Test Plan: BEHOLD

Reviewers: btrahan

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T961

Differential Revision: https://secure.phabricator.com/D2007
Minor, part 1/2, fix class casing.
Minor, part 2/2, fix class casing.
Projects: Filter out archived projects from all project view

Summary: Adds an "allactive" filter in addition to the all projects filter.

Test Plan:
visit All Active view (/project/filter/allactive/) and
 see that it lists all projects except those which have been archived.
 Visit other filter views to be sure nothing else got broken.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D2010
Project symbol import from 'ctags'

Summary:
I noticed that documentation said it is possible to have 'ctags' symbol import, so I hacked a quick version. I tested it on Python based project and successfuly imported symbols.

It is limited to classes right now, as the importer script complained about not-unique method names (there are a lot of 'get' & 'post' methods accross classes in my project).

If you would have any feedback about this, I would definetly try to wrap it up for possibly merging into main repository.

Test Plan:
Required 'ctags' tool (ctags.sourceforge.net/) Tested to work with version 5.8+ and didn't work with 3.x.

1. `find . -type f '*.py' | ./generate_ctags_symbols.php > /tmp/symbols`
2. `./import_project_symbols.php` < /tmp/symbols

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: seporaitis, aran, epriestley

Maniphest Tasks: T1034

Differential Revision: https://secure.phabricator.com/D1995
Minor, fix an issue with synthetic diff construction for files with several blank lines at the end.
Allow installs to add a custom corp/org header link

Summary: A bunch of installs are doing this to varying degrees of success anyway, make it easier and nudge them toward a more consistent approach.

Test Plan: Set a custom logo, viewed normal and admin pages.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T700

Differential Revision: https://secure.phabricator.com/D2019
Minor, update celerity map.
Minor, fix various CSS positioning derps.
Minor, further derps.
Add "Resign from Audit" and "Close Audit" actions to Diffusion

Summary:
See some discussion in D2002. Add two new actions:

  - Resign: (auditor only) closes your open request (user request ONLY) by putting it in a "resigned" state.
  - Close: (author only) closes all open requests by putting them in a "closed" state.

@davidreuss, this is probably conflict-city with D2002 -- I'll wait for you to land first and then handle the merge on my end.

Test Plan: Resigned from and closed audits.

Reviewers: 20after4, davidreuss, btrahan

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T904

Differential Revision: https://secure.phabricator.com/D2013
Add an "Explicit-CCs" header to Differential

Summary: This header allows recipients to distinguish between CCs generated by Herald and CCs generated by humans.

Test Plan: Created a Herald rule to add a bunch of CC's to every revision. Created a revision. Added some CCs manually. Verified that only manual CCs appeared in the "Explicit" header.

Reviewers: btrahan, vrana

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T808

Differential Revision: https://secure.phabricator.com/D2018
Minor, see rPc92e37c1b1b17b8c937ef618a6e856499c23cc80

Auditors: vrana
Minor, don't collapse comment content if there are inlines.

Auditors: vrana
Check required PHP version

Summary: D1999#4

Test Plan:
/ with HPHP.
/ with required version bumped to 5.14.0.

Reviewers: epriestley

Reviewed By: epriestley

CC: nh, aran, epriestley

Differential Revision: https://secure.phabricator.com/D2020
In Diffusion browse views, show a README file if one exists

Summary: COMPLETELY ORIGINAL IDEA

Test Plan: Browsed around Phabricator, got helpful readmes in some cases.

Reviewers: davidreuss, btrahan

Reviewed By: btrahan

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D2022