#141727 by merlinofchaos, dvessel, sun: restore themeability support for maintenance pages (regression)

#190283 by myself and JirkaRbyka: use get_t() in pre-database setup code, add missing javascript key to language objects (kills notices) and document st() better

#112064 by Dave Cohen and pwolanin: do not cache installer redirects, so live Drupal pages will be visible instead of cached installer pages

#166593 by hswong3i: move literal values out of some core queries to support cross-database compatibility (ie. better SQL parsing and altering options)

#150554 suggested by kkaefer, patch by me: rename 'po' folders to the more user friendly 'translations' name

as a side effect, improve usability of the module screen by performing module
changes all at once

- Patch #99011 by merlinofchaos: remove sites/default/settings.php and ship with sites/default/default.settings.php.

- Patch #76522 by RobRoy: avoid name clash between modules and install profiles.  Removing redundant hook.

- Patch #101829 by douggreen, ChrisKennedy and Grugnog2: drupal_install_fix_file() fails to calculate correct permissions.

- Patch #88287 by asimmonds, dww et al: installer doesn't support modules outside root/modules directory.  Critical bugfix.

- Patch #77919 by chx, eaton, moshe, et al: enable programmaticaly submitted forms via the pull model.

See: http://drupal.org/node/64279#t-placeholders

- Make installer code integrate better with module.inc / system.module
- Fix schema version bug when installing core