Improve Diffusion blame views

Summary:
  - Make some effort to simplify the code.
  - Make "Skip Past This Commit" work in Git and Mercurial.
  - Make blame work in Mercurial.
  - Add tooltip hover state to show more information about commits.

Test Plan: Viewed blame views in SVN, Git, Hg. Clicked line numbers, hovered/clicked commits, hovered/clicked "blame past..."

Reviewers: btrahan, vrana, jungejason

Reviewed By: vrana

CC: aran

Maniphest Tasks: T378

Differential Revision: https://secure.phabricator.com/D2142
Show user a notice when they view "My Projects" for feed but haven't joined any projects

Summary: Currently, we show them everything. Instead, show them an explicit notice.

Test Plan: Looked at "My Projects" feed with no projects.

Reviewers: btrahan, vrana, jungejason

Reviewed By: jungejason

CC: aran

Maniphest Tasks: T1015

Differential Revision: https://secure.phabricator.com/D2143
Make error views look less awful

Summary: These elements look heavy and out of place right now.

Test Plan: Looked at error views in uiexample page.

Reviewers: btrahan, vrana, jungejason

Reviewed By: jungejason

CC: aran

Differential Revision: https://secure.phabricator.com/D2144
Add an "--ignore-duplicates" flag to import_project_symbols.php

Summary: People are hella lazy and don't want to do this themselves.

Test Plan: Generated a symbol file with duplicates and piped it in, got an import under --ignore-duplicates.

Reviewers: kdeggelman, btrahan, vrana, jungejason

Reviewed By: jungejason

CC: aran

Differential Revision: https://secure.phabricator.com/D2145
Don't use "/e" in PHPMailer Lite

Summary: PHP 5.4 raises an E_STRICT warning about "/e", and it's a generally awful idea, even though this case doesn't look exploitable. Silence the warning by using preg_replace_callback() instead of "/e".

Test Plan: Sent myself a message with a bunch of multibyte UTF8 characters in it, it came through cleanly.

Reviewers: btrahan, vrana, jungejason

Reviewed By: vrana

CC: aran

Maniphest Tasks: T1056

Differential Revision: https://secure.phabricator.com/D2147
Use Celerity to version all static resources

Summary:
We don't use versioned URIs for images, so when they change users may get old versions.

This was a particular issue with the recent logo change, which several users reported cache-related issues from.

Instead, use Celerity to manage image URI versions in addition to CSS/JS.

This is complicated, because we need to rewrite image URIs inside of CSS, which means the hash of a CSS file has to be derived from the current image data. Otherwise, when we updated an image the CSS wouldn't update, so we wouldn't be any better off.

So basically we:

  - Find all the "raw" files, and put them into the map.
  - Find all the CSS/JS, perform content-altering transformations on it (i.e., not minification) based on the partial map, and then put it into the map based on transformed hashes.

(If we wanted, we could now do CSS variables or whatever for "free", more or less.)

Test Plan:
  - Regenerated celerity map, browsed site, verified images generated with versioned URIs.
  - Moved "blue" flag image over "green" flag image, regenerated map, verified "green" flag image and the associated CSS changed hashes.
  - Added transformation unit tests; ran unit tests.

Reviewers: btrahan, vrana, jungejason

Reviewed By: vrana

CC: aran

Maniphest Tasks: T1073

Differential Revision: https://secure.phabricator.com/D2146
Detect missing InnoDB in MySQL

Summary: See T993. MySQL fails very very softly if you request an engine which does not exist. Detect and fail if the InnoDB engine is missing or broken.

Test Plan: Faked InnoDB missing, got a failure. Ran normally, got success.

Reviewers: btrahan, vrana, jungejason

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T993

Differential Revision: https://secure.phabricator.com/D2160
Add some basic signature stripping

Summary: See discussion in T789. Covered the obvious cases, at least. We can refine this as we get a larger sample size.

Test Plan: Unit test coverage.

Reviewers: btrahan, vrana, jungejason

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T789

Differential Revision: https://secure.phabricator.com/D2154
Improve insert behavior for drag-and-drop and paste uploads

Summary: In Safari, Firefox and Chrome, respect cursor position and selection ranges.

Test Plan: Dragged-and-dropped files into the middle of text, end of text, and a selected text range in Safari, Firefox and Chrome. Copy/pasted files into similar cases in Chrome. Got expected, normal behavior in all cases.

Reviewers: btrahan, vrana, jungejason

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1016

Differential Revision: https://secure.phabricator.com/D2155
Improve exception behavior for storage engine failures

Summary: See T1021. Raise configuration or implementation exceptions immediately. When all engines fail, raise an aggregate exception with details.

Test Plan: Forced all engines to fail, received an aggregate exception. Forced an engine to fail with a config exception, recevied it immediately.

Reviewers: btrahan, vrana, jungejason

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1021

Differential Revision: https://secure.phabricator.com/D2157
Improve documentation for System Agents and other account roles

Summary: Explain this stuff better and add some documentation links.

Test Plan: Read documentation, viewed account edit interfaces.

Reviewers: btrahan, vrana, jungejason

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T834

Differential Revision: https://secure.phabricator.com/D2158
Minor, make sure burnup buckets are unique year-over-year

Auditors: btrahan, vrana, jungejason
Standardize mysql.configuration-provider

Summary: NOTE: BC break!

Test Plan: /

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, nh

Differential Revision: https://secure.phabricator.com/D2130
Prefer external [[]] links in Remarkup

Test Plan: I didn't repro it probably because of custom rules.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran

Maniphest Tasks: T1090

Differential Revision: https://secure.phabricator.com/D2150
Fix reticle with inline comments editor

Test Plan: Hover textarea in inline comment editor

Reviewers: epriestley

Reviewed By: epriestley

CC: aran

Differential Revision: https://secure.phabricator.com/D2152
Support NO_BACKSLASH_ESCAPES in escapeStringForLikeClause()

Summary: Also simplify this clunky code.

Test Plan: /owners/view/search/?name=%25

Reviewers: epriestley

Reviewed By: epriestley

CC: aran

Differential Revision: https://secure.phabricator.com/D2114
Highlighting blame is broken if there is an unavailable commit

Test Plan: .../PhotoSnowlift.js?view=blame

Reviewers: jungejason

Reviewed By: jungejason

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D2165
Don't display "Foul Magicks" in Maniphest

Summary:
There was a typo:
`PHID-!!!!-NO_PROJECT` instead of
`PHID-!!!!-NO-PROJECT`

Also use `<em>` to differentiate from project named "(No Project)".

Test Plan:
/maniphest/report/project/
Click on (No Project).

Reviewers: epriestley

Reviewed By: epriestley

CC: aran

Differential Revision: https://secure.phabricator.com/D2167
Use head_key() and last_key() to explicitly communicate intent

Summary:
PHP arrays have an internal "current position" marker. (I think because foreach() wasn't introduced until PHP 4 and there was no way to get rid of it by then?)

A few functions affect the position of the marker, like reset(), end(), each(), next(), and prev(). A few functions read the position of the marker, like each(), next(), prev(), current() and key().

For the most part, no one uses any of this because foreach() is vastly easier and more natural. However, we sometimes want to select the first or last key from an array. Since key() returns the key //at the current position//, and you can't guarantee that no one will introduce some next() calls somewhere, the right way to do this is reset() + key(). This is cumbesome, so we introduced head_key() and last_key() (like head() and last()) in D2161.

Switch all the reset()/end() + key() (or omitted reset() since I was feeling like taking risks + key()) calls to head_key() or last_key().

Test Plan: Verified most of these by visiting the affected pages.

Reviewers: btrahan, vrana, jungejason, Koolvin

Reviewed By: jungejason

CC: aran

Differential Revision: https://secure.phabricator.com/D2169
Unify links to www.phabricator.com and phabricator.com

Test Plan:
  scripts/sql/upgrade_schema.php

Verify links at /directory/2/.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran

Maniphest Tasks: T1096

Differential Revision: https://secure.phabricator.com/D2172