#709892 by drunken monkey, Yorirou: Complete entity CRUD hook invocations: Add a hook_entity_delete() for consistency.

#895176 by ksenzee, dereine, mongolito404, Berdir, moshe weitzman, chx: Fixed upgrade fails because of integrity constraint violation in system_update_7060.

#706842 by bangpound, bjaspan, Damien Tournoud, chx, aaronbauman: Fixed 'taxo as field' update broken + wipes some node/term associations .

#838438 by Damien Tournoud, chx: Added basic tests for D6 => D7 upgrade path, and framework for further extending upgrade test coverage. W00t! :D

- Patch #780154 by chx, noahb, dhthwy, pwolanin, aspilicious, jhodgdon, dereine, bjaspan: listing API for field API.

#211182 by Damien Tournoud, David_Rothstein, clemens.tolboom, scor, hunmonk, et al: Allow updates to specify dependencies to ensure they run in a predictable order.

- Patch #598758 by stBorchert, sun, pwolanin, eigentor, TheRec, seutje: add link to the permissions and configuration page of each module from the module configuration page. Great team work!

#600032 by c960657: Removed browser.inc. Please see http://drupal.org/project/browser if you'd like to help with a more fleshed-out abstract browser for possible inclusion in D8.

- Patch #251792 by pwolanin, Damien Tournoud, slantview, c960657: added a locking framework for long running operations.

- Patch #340283 by boombatower, dmitrig01 et al: abstract the simpletest broswer in its own class/object.

- Patch #395472 by JacobSingh, chx, cwgordon7: more improvements to the file transfer system to pave the path for a plugin manager.  Heroic effort.

  et al.  Can you say 'registry'?  Drupal now maintains an internal registry of
  all functions or classes in the system, allowing it to lazy-load code files as
  needed (reducing the amount of code that must be parsed on each request). The
  list of included files is cached per menu callback for subsequent loading by
  the menu router. This way, a given page request will have all the code it needs
  but little else, minimizing time spent parsing unneeded code.

  Drupal core!  This is an important milestone for the project so enable
  the module and check it out ... :)

  Thanks to Rok Žlender, Károly Négyesi, Jimmy Berry, Kevin Bridges, Charlie
  Gordon, Douglas Hubler, Miglius Alaburda, Andy Kirkham, Dimitri13, Kieran
  Lal, Moshe Weitzman, and the many other people that helped with testing
  over the past years and that drove this home.

  It all works but it is still rough around the edges (i.e. documentation
  is still being written, the coding style is not 100% yet, a number of
  tests still fail) but we spent the entire weekend working on it in Paris
  and made a ton of progress.  The best way to help and to get up to speed,
  is to start writing and contributing some tests ... as well as fixing
  some of the failures.

  For those willing to help with improving the test framework, here are
  some next steps and issues to resolve:

    - How to best approach unit tests and mock functions?
    - How to test drupal_mail() and drupal_http_request()?
    - How to improve the admin UI so we have a nice progress bar?
    - How best to do code coverage?
    - See http://g.d.o/node/10099 for more ...