#154949 by Crell and dww: let modules and themes specify a minimum required PHP version, under which they will not be possible to be turned on

#153998 by pwolanin: separate edit a delete permissions, so people who can edit a node cannot delete it too automatically

#154218 by Steven: HTML to text email converter, centralizing email wrapping in Drupal core and providing a solid conversion function for contributed modules

#154224 by hunmonk: add destination argument to _drupal_delete(), instead of using drupal_goto() directly, so the callback cycle can complete

#150210 by bjaspan and Frando: explicit table names for create table statements and fixing a schema referencing bug

#152670 by myself: refactor PO generation to decouple data collection, file generation and HTTP download; fix a bug with plural exports along the way

#151280 by Rok Žlender, webernet and myself: use the real cache system, once we have the database set up, to get the values set by the configuration form and the install profile to the proper cache values

#133028 by alienbrain and Moshe Weitzman: allow positioned submit buttons in node forms via form_alter by not hard-coding the button order

  Let this be the day where we help revolutionize the online society, and the
  way websites and web services interoperate.  Or something.

Annotate the locale schema to help developers understanding what is stored in some of the far from obvious fields. Patch by myself.

#150521 by myself: streamline locale runtime performance and clean up code by not storing empty translations