merged field_group submodule. TODO test new version of field_group, IDs seem to be removed ...

sites/all/modules/contrib/fields/field_group/README.txt

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+
+History:
+  Field_group was written for Drupal 7. For drupal 6, the module is
+  located in the CCK module (http://drupal.org/project/cck).
+  As drupal core has a fields API drupal > 6, the field_group module
+  is considered a contribution.
+
+Description:
+  field_group is a module that will group a set of fields. In Drupal7,
+  with fields, one means all fields that come from fieldable entities.
+  You can add fieldgroups in several types with their own format settings.
+  field_group has API functions to add your own formatter and rendering for
+  it.
+  One of the biggest improvements to previous versions, is that fieldgroups
+  have unlimited nesting, better display control.
+  Note that field_group will only group fields, it can not be used to hide
+  certain fields since this a permission matter.
+
+Module project page:
+  http://drupal.org/project/field_group
+
+Documentation page:
+  http://drupal.org/node/1017838
+  http://drupal.org/node/1017962
+
+Available group types:
+  - Fieldsets
+  - Horizontal tabs
+  - Vertical tabs
+  - Accordions
+  - Divs
+  - Multipage steps: <strong>Note: This is only client side.
+  - HTML5 group type
+  - Html element
+
+To submit bug reports and feature suggestions, or to track changes:
+  http://drupal.org/project/issues/field_group
+
+-- MAINTAINERS --
+
+stalski - http://drupal.org/user/322618
+swentel - http://drupal.org/user/107403
+zuuperman - http://drupal.org/user/361625
+
+-- INSPIRATORS --
+
+yched - http://drupal.org/user/39567