Issue #1706064 by chx, katbailey, effulgentsia, podarok et al: Compile the Injection Container to disk.

Issue #1326664 by Lars Toomre, Albert Volkman, sven.lauer, tim.plunkett: API docs cleanup for parts of system module and other files

Issue #1608878 by jessebeach, tim.plunkett, dead_arm, nod_, sun, effulgentsia, Everett Zufelt, geerlingguy: Added CTools dropbutton to core.

Issue #1575060 by andypost, mcjim, nod_: Fixed ajax_html_ids() are broken for forms with file element (encoding=multipart/form-data).

Issue #1362974 by droplet, dcam, Jacine, tkrajcar: Remove type='text/javascript' from <script> tags.

Issue #362889 by Xano, andypost, dawehner, Davy Van Den Bremt, cweagans, sun: Move drupal_common_theme() from common.inc into theme.inc.

Issue #1705748 by n3or, tim.plunkett, sun, xjm, boombatower: Convert simpletest settings to configuration system.

Issue #1700382 by Albert Volkman, cam8001: Replace remaining references to drupal_attributes() with new Attributes().

Issue #1737148 by nod_, SebCorbin, larowlan, tim.plunkett, Albert Volkman, nick_schuch, sun: Explicitly declare all JS dependencies, don't use drupal_add_js().

Issue #1669902 by alexpott, aspilicious, sun: Adjust system.performance configuration for new guidelines.

Issue #1618172 by jcisio, corvus_ch, estebanvalerio.h, Berdir: Remove entity_uri() in favor of EntityInterface::uri().

Issue #562042 by cburschka, Rob Loach, sun, scor: Added Search for install profiles in sites/[all|site]/profiles folders, and move core profiles into /core/profiles.

Revert "- Patch #1705748 by n3or, no_commit_credit: Convert simpletest settings to configuration system."

This reverts commit 490386fa. It broke testbot.

Using the language_manager wrapper function to return a language whether or not we're in the requet scope

Conflicts:

	core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php

Issue #1688016 by sun: Fixed drupal_cron_run() unconditionally re-enables writing of the user session.