This reverts commit 24c357b5.

Issue follow-up #1007830 by Damien Tournoud, basic: Fixed Nested transactions throw exceptions when they got out of scope.

Issue #1347812 by nanotube, xjm: Fixed Remove/replace documentation references to upload_file_load() and upload_file_delete().

Issue #381994 by xjm, good_man, elcuco, brianV, yhager: Fixed Machine-name fields are always in Latin characters, and should therefore always be LTR.

Issue #1359326 by xjm: Fixed t() documentation does not clearly indicate that  options are documented in format_string() docs.

Issue #1338428 by jbrown, BTMash, Tor Arne Thune: Fixed image_dimensions_scale() and image_scale_effect() are ungrokable and buggy.

Issue #1371256 by ayelet_Cr, oriol_e9g: Document that QueryConditionInterface::condition() should not be used to add NULL conditions.

Issue #942782 by pillarsdotnet, xjm, becw, timhilliard, JohnAlbin, jrchamp, Tor Arne Thune, Damien Tournoud, jn2, James Andres, dstol, melon, colan: Fixed Custom menus never receive an active trail.

Issue #866292 by marcingy, ygerasimov, quicksketch, attiks, furamag: Fixed '0' not displayed as checkbox / radios options (nor as any element #title).

Issue #1366740 by patrickd: Fixed theme_progress_bar() should have more information about when to use function.

Issue #1240256 by lyricnz, Akaoni, jenspeter: Fixed file_unmanaged_copy() Fails with Drupal 7.7+ and safe_mode() or open_basedir().

- Patch #1258000 by chx, xjm, bfroehle: SelectQuery::countQuery() inappropriately removes SQL expressions.

This reverts commit 06f31080.

- Patch #1229868 by nicl, DjebbZ: hook_form_BASE_FORM_ID_alter(), hook_form_alter(), and hook_form_FORM_ID_alter() doc inconsistent.

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

Issue #1322278 by rocket_nova, jhodgdon: Fixed Documentation problem with theme -- doesn't link to theme functions list.

Issue #1198398 by jm@bellcom.dk, AllRob: Fixed Timezone selected on install not correctly saved to admin user account.

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

Issue #1313342 by CrookedNumber, RaulMuroc, Yuri: Fixed Curacao should appear in standard_country_list().

Issue #655190 by dealancer: Fixed Allow hook_install_tasks() to be called from a profile's .install file (or document that it can't be).

Issue #488496 by loganfsmyth, Gábor Hojtsy: Implement missing msgctx context in JS translation for feature parity with t().

Issue #212284 by Damien Tournoud, alexanderpas, dww: Fixed security check in 'configure' stage not compatible with overriding variables: site_name() and site_mail().

Issue #1006714 by Steven Jones, chx, mr.baileys, xjm, carlos8f: Fixed drupal_get_path() doesn't work for profiles.

Issue #951644 by catch, David_Rothstein, aschiwi, xjm: Fixed Requirement warnings (e.g. for PHP memory limit) are not shown on install or update unless there is a requirement error also.

Issue #1011614 by catch, pillarsdotnet: Fixed Theme registry can grow too large for MySQL max_allowed_packet() and memcache default slab size.

Issue #673020 follow-up by attiks: Critical fix to Content-Language HTTP header to not cause issues with Drush.