Issue #1430986 by Gábor Hojtsy, plach: Clean up naming for language negotiation configuration functions/paths.

Issue #1183250 by jessebeach, linclark, aspilicious, sun, Everett Zufelt, scor: Add a theme_datetime() function to consistently theme dates and datetimes.

- Patch #984874 by LSU_JBob, dalin: Improve test performance (and hence PIFR performance) by extending DrupalUnitTestCase where possible.

- Patch #1405604 by aspilicious: Fixed RTL stylesheets don't get triggered when locale isn't enabled.

Issue #1402962 by msonnabaum, marcing, xjm: Fixed Render cache shouldn't treat empty strings as a cache miss.

Issue #899444 by sun, webchick: Fixed Declutter 'System' test group by applying coding standards fixes to common.test.

Issue #278425 by andypost, OnkelTem, chx, c960657, droplet et al: Fixed Using basename() is not locale safe.

Issue #970338 by jbrown, joachim: Fixed drupal_write_record() cannot save an empty (full default) row.

- Patch #479368 by Roger Saner, xjm, Heine, mcarbone, keichee, asimmonds: Create RFC compliant HTML safe JSON.

- Patch #765860 by effulgentsia, dww, dereine, mikey_p, xjm, sun, sven.lauer: drupal_alter() fails to order modules correctly in some cases.

Issue #916424 by rjgoldsborough, Jacine: Merge system.messages.css and system.menus.css into system.theme.css.

Issue #865536 by ericduran, effulgentsia, cosmicdreams, sreynen, jessebeach et al: Added drupal_add_js() is missing the 'browsers' option.

Nate Lampton authored Oct 30, 2011 and catch committed Nov 01, 2011

Issue #22336 by quicksketch, scor, boombatower, and rfay. Move all core Drupal files under a core subdirectory.

Nate Lampton authored Oct 30, 2011 and catch committed Nov 01, 2011

Issue #22336 by quicksketch, scor, boombatower, and rfay. Move all core Drupal files under a core subdirectory.

- Patch #1280530 by loganfsmyth: decouple domain/path negotiation setup from language configuration.

- Patch #1183430 by TR, oriol_e9g: t function strings should not have whitespaces at beginning or end.

- Patch #1286868 by rickmanelius: rename hook_library() and hook_library_alter() to standard pattern.

Issue #1136130 by pillarsdotnet: Reinstated WATCHDOG_* constants; using PHP equivalents caused issues on Windows.

- Patch #759844 by jpmckinney, dixon_, plach, ksenzee, fabsor, pillarsdotnet: overlay does not work with prefixed URL paths.

- Patch #859602 by catch, bfroehle: #cache does not record the #attached declared in child elements.

#826486 by kscheirer, drunken monkey, tstoeckler, jhodgdon, sun: Fixed format_date() does not respect admin-defined date formats