#882164 follow-up by Gábor Hojtsy, reglogge: Further clarifications to localization install instructions.

- Patch #896828 by Jeff Burnz, Manuel Garcia, yoroy: vertical tabs - no visual connection between the active tab and its content.

- Patch #850612 by Meriial, merlinofchaos, adrian: setting class 'use-ajax-submit' for form submission causes js error(s).

#918482 by sun: Add 'cache system' as Drupal core project component and appoint Damien Tournoud as maintainer.

#418302 follow-up by David_Rothstein, reglogge, dww: Deal with obscure edge case when attempting to create settings.php during installation.

#882164 by aschiwi, Gábor Hojtsy, David_Rothstein, reglogge, et al: Fix the 'install from another language' instructions so that they actually work.

#897638 by casey, sun, mgifford, et al: Allow .element-invisible to work with focusable elements like links.

- Patch #789186 by effulgentsia: improve drupalPostAJAX() to be used more easily, leading to better AJAX test coverage. (Actual commit so we have proper credit.)

- Patch #789186 by effulgentsia: improve drupalPostAJAX() to be used more easily, leading to better AJAX test coverage. (Rollback)

- Patch #403034 by roderik, Damien Tournoud: node_assign_owner_action() logs an object type instead of the type name.

- Patch #848312 by Jeff Burnz, tsi, jensimmons, tim.plunkett, aspilicious, bleen18: better Druplicon logo for Bartik.

- Patch #732914 by Jacine, sun, reglogge, cosmicdreams: improve the markup/CSS for content and user filter forms.

- Patch #909272 by moshe weitzman, David_Rothstein: remove stub update functions and renumber the remaining ones.

- Patch #898028 by Everett Zufelt: change heading before Toolbar to 'Administrative Toolbar' instead of 'management'.

- Patch #908966 by Jeff Burnz: Bartik's default link color has inadequate contrast to background (WCAG 2.0 violation).