Issue #2368185 by Gábor Hojtsy: Fixed Content views shipped by node module have non-functional timestamp field.
Issue #2367285 by cilefen: Fixed Function doc typo for hook_page_attachments_alter() in theme.api.php.
Issue #2368081 by Gábor Hojtsy | andypost: Fixed Remove outdated @todo in hook_user_install().
Issue #1938918 by joelpittet, lauriii, botanic_spark, mdrummond, nielsonm: Convert menu theme tables to table #type.
Issue #2368957 by mikispeed: Fixed Set class on MoreLink as array instead as string.
Issue #2369107 by lussoluca: Update Guzzle to 5.0.3.
Issue #2368739 by Wim Leers: Fixed user_page_attachments() unnecessarily adds an individual CSS file on every page.
Revert "Issue #2369107 by lussoluca: Update Guzzle to 5.0.3."

Temporary revert; CMF 1.3 is also ready and is a bigger PITA to re-roll.

This reverts commit d806a9bb87f7826a35f404a14e7eacffc45e79d9.
Merge branch '8.0.x' into 8.0.x-2206571-config-unit-tests