Issue #2498599 by Cottser, naveenvalecha, webchick, karolus, cilefen: Remove sdboyer/gliph since it is unused by core

Issue #2493911 by dawehner, larowlan, damiankloip, hussainweb, jibran, cilefen, benjy, iMiksu, mtdowling: Update guzzle, goutte and mink-goutte-driver to the latest release

Issue #2508231 by timmillwood, amateescu, hussainweb, catch, dawehner, David_Rothstein, Mixologic, effulgentsia: Raise minimum required version of PHP to 5.5.9

Issue #2343035 by fago, dawehner, larowlan, ianthomas_uk, cilefen, hussainweb, Miroling, jibran, beejeebus, dashaforbes, webmozart, klausi: Upgrade validator integration for Symfony versions 2.5+

Issue #2429363 by babruix, twistor, filijonka, sun, Mile23, daffie, Wim Leers, chx: Add HTML5-lib to Drupal 8 core for the filter system and for the testing system

Issue #2433009 by hussainweb, grom358, neclimdul, daffie, larowlan, alexpott, pcambra, benjy, jibran, phenaproxima, moshe weitzman, nick_schuch: Add Mink, with Goutte driver, to core

Revert "Issue #2433009 by hussainweb, grom358, neclimdul, daffie, larowlan, alexpott, pcambra, benjy, jibran, phenaproxima, moshe weitzman, nick_schuch: Add Mink, with Goutte driver, to core"

Oops. Accidentally committed the composer-only patch.

This reverts commit d653d386.

Issue #2433009 by hussainweb, grom358, neclimdul, daffie, larowlan, alexpott, pcambra, benjy, jibran, phenaproxima, moshe weitzman, nick_schuch: Add Mink, with Goutte driver, to core

Revert "Issue #2433009 by hussainweb, grom358, daffie, larowlan, alexpott, pcambra, benjy, jibran, phenaproxima, moshe weitzman, nick_schuch: Add Mink, with Goutte driver, to core"

This reverts commit 2b96082d.

Issue #2433009 by hussainweb, grom358, daffie, larowlan, alexpott, pcambra, benjy, jibran, phenaproxima, moshe weitzman, nick_schuch: Add Mink, with Goutte driver, to core

Issue #2253593 by neclimdul, damiankloip: Stop classloader searching filesystem for classes before drupal_classloader() is called

Issue #2375997 by Mile23, hussainweb, tstoeckler, omers: Avoid tying Drupal 8's composer.json to specific package commits

Issue #1975220 by davidwbarratt, tstoeckler, mradcliffe, RobLoach, Mile23, hussainweb: Allow a Composer user to manage Drupal, modules, and PHP dependencies with a custom root composer.json

Issue #2234277 by cilefen, hussainweb, Xano, netlooker, martin107: Composer update (includes security fixes).

Issue #2267551 by jfhovinne, ParisLiakos, catch: PHP 5.4.5 needed to avoid zend failure when using autoloaded traits.