Issue #1369536 by dww, DuaelFr, drumm: Added an alter hook on $group when loading group.
Issue #1926938 by yannickoo: Add a configurable html wrapper
Issue #2041687 by drumm | tvn: Fixed Notice: Undefined index: classes in field_group_pre_render_prepare().
Merged important features of 2.x into 1.x + Make sure defaults are applied when switching formatter
Merged with head
Issue #1278252 by rbayliss, firebird, jamesharv | goron: Fixed Fieldgroups should be created when adding the fields to the feature.
Added nesting support for field_group_hide_field_groups
Issue #1871244 by AmbikaFR: Fixed Missing some t() calls on admin fieldgroup pages.
Issue #1917674 by myoung: Added Needed a way for horizontal tabs to be linked with # tag.
Issue #1473792 by jghyde, yannickoo | dking: Fixed accordion group bug.
Issue #1963740 by barraponto: Fixed 'Add new group' row lacks proper colspans.
Issue #1657306 by mrfelton: Fixed Field group form elements are placed at the wrong location within the form array structure.
Fix upgrade path for D6 > D7
Updated readme
Return FALSE in field_group_menu_load instead of null
Issue #2037739 by Zach Harkey: Fixed Capitalize label for HTML5 footer formatter.
Issue #1945848 by jamsilver, Dave Reid: Fixed Horizontal tabs legends display in Seven (when inside vertical tabs).
Issue #2018885 by aaronbauman: Added field_group_info_groups() should return a result regardless of () argument.
Issue #2065827 by LewisNyman: Remove CSS classes that communicate the lack of an effect.
Issue #2076419 by alexweber: Fixed Classes stored as string but treated like array when creating a new field group.