#446390 patch by mani.atico and me: improve rules condition to be more robust when checking for empty values

- #614292 by DeFr - Fix CCK Reference fields based on views broken by recent change in views_plugin_style Views 2.7 (#502348).

- #604830 by mattyoung - 32 characters limit on field and group identifiers in "Manage fields" screen.

- #589306 warning: Invalid argument supplied for foreach() in includes/panels/content_types/content_field.inc on line 166.

- #231453 Allow fields index their columns. Implemented for reference value column in node and user reference fields. Needs update.php.

- #519870 by joachim - Add a note to say offset starts from 0 in grouping options for views handler for multiple values fields.

- #505278 by Michelle, merlinofchaos - Provide backward compatibility with previous method to build Panels 3 subtype names for fields.

- #505278 by Michelle, merlinofchaos - Provide backward compatibility with previous method to build Panels 3 subtype names for fields.

- #514452 Add new argument $node to content_access() to enhance the context for hook_field_access().

- #522112 by hefox, prevent malformed condition for vid IN () in views handler for multiple values fields.

  Implementation of fieldgroup_view_group() that can be used to render field groups.

  Follow up to fix a minor typo. Oops!

#479074 by rickward: prevent minor XSS vulnerability when displaying user-submitted 'Body field' labels.

#369364 Views integration: fix non-XHTML markup when displaying fields with the 'group multiple values' option.