userpoints 5.x-2.11

Changes since 5.x-2.10:

• Several fixes for the schema:
  - added key on last_update field.
  - moved status to be before event, since better have varchar stuff at the end
  - changed event from text to varchar(32). If you want a longer field use description.
  - removed /*!40100 comment from PostgreSQL
  - removed unnecessary create table statements in _update_() function
• #149152 by ckg, PostgreSQL: u.name must appear in the GROUP BY clause
  #149151 by ckg, add support for PostgreSQL.
• #146491 by jredding, changes to userpoints transaction tools.
• #152819: Module .info files should not define 'version' in CVS
• #152936 by Arancaytar, hook_update_4() is broken.
• #142956 by mercmobily, does two things:
  - keep audit trail when $op is "txn approve" userpoints_userpointsapi
  - Have a searchable index for userpoints_txn.
  These changes make userpoints work with the simple karma module.