Pending Release (master-branch only)

Bugfixes:

Use #underscore, not #downcase for help text scope (#140, @atipugin)
Radio button and checkbox labels will now include the disabled class as needed. (#156, @ScottSwezey)

Features:

Allow users to display validation errors in labels (#144, @timcheadle)
Use humanized attribute name in label errors (#146, @atipugin)
Allow to skip label rendering (#145, @atipugin)
Added a required CSS class for labels with required attributes (#150, @krsyoung)
Added option to customize labels' class.

2.2.0 (2014-09-16)

Bugfixes:

Fixed an exception raised when form_group block returns nil (#111)
Fixed an exception on human_attribute_name when using bootstrap_form_tag (#115)
Set offset in form_group without label in horizontal layout (#94, @datWav)
Fixes an offset bug in form_group without a given label in horizontal layout (#130, @datWav)
Fixed bug where collection_check_boxes doesn't work if all are unchecked (#116, @burnt43)

Features:

Added the ability to append/prepend buttons (@retoo)
Added support for time_zone_select
Accept multiple values, and objects as well, on collection_check_boxes checked option (#114)
Added support for hidding attribute name in errors_on helper (@datWav)
Added support for additional class to the wrapper form_group by a field (@datWav)
Support showing error summaries when inline_errors is enabled (@rosswilson)
Name is now optional when creating static controls
Keep original form helper methods with _without_bootstrap suffix (#123, @a2ikm)
Added glyphicon support
Added i18n support for help messages (#122, @huynhquancam)
Added the ability to pass any attributes to wrapper (#136, @atipugin)
Split monolithic test file into several smaller files (#141, @spacewander)
Added role="form" attribute to forms (#142, @spacewander)

Bugfixes:

Features:

Bugfixes:

i18n fix for checkbox labels (@i10a)
Wrapped date & time helpers inside control-specific css classes to prevent stacking
control-label class was not being added unless the form was horizontal (@slave2zeros)
selects & collection selects were dropping label options
allow html content in check_box tag label (@desheikh)
allow check_box label to be defined with a block
omit form-control class from file_field (@mbrictson)
Collection inputs honour checked attribute (@desheikh)
Fixing label/input pairing for checkbox collections (@byped)
Removing for attribute on radio button labels (@sigmike)

Features:

The control_class can be overridden per field by passing in the :control_class option. Default value is "form-control".
Make name optional in FormBuilder#submit (@adrpac)
Added the FormBuilder#primary helper back in
Added a FormBuilder#static_control helper
Added support for radio_buttons_collection and check_boxes_collection
Added a FormBuilder#error_summary helper method
inline_errors can be turned off: bootstrap_form_for(obj, inline_errors: false) When inline errors are off, FormBuilder#alert_message contains the error summary. This can also be turned off with the option 'error_summary: false'
Added support for: color_field, date_field, datetime_field, datetime_local_field, month_field, range_field, search_field (#42), time_field, week_field
Added ability to override the left/right classes for a particular control when using horizontal forms. (@baldwindavid)
Added support for grouped_collection_select (@rzane)
Added support of Rails 4 syntax for collection inputs (@desheikh)
Renamed options :left to :label_col and :right to :control_col
Renamed option :style to :layout (@baldwindavid)
Added errors_on helper (@baldwindavid)
Added per field layout option (@baldwindavid)
Added support for bootstrap_form_tag (@baldwindavid)