Merge pull request #20 from buren/master

Bugfix: Removed control class from file_field
Include IconHelper in GlyphiconHelper

Needed since 393c9c2 changes glyphicon to use the `icon` helper.

Also remove duplicate `glyphicon` method declared in IconHelper.
Extract FileFieldHelper from FieldHelper

Since 9f66c9c, `file_field` does not behave as the remaining fields as
much: does not have a `form-control` class, and even adding a placeholder
does not make sense.

For better legibility, `file_field` is now extracted into its own helper.
Merge branch 'file-field'
Normalize bh & rails fields_for arguments
* All old tests passes, so should be backward compatible
* Closes #21

See https://github.com/rails/rails/blob/7a085dac2a2820856cbe6c2ca8c69779ac766a97/actionview/lib/action_view/helpers/form_helper.rb#L1509
Merge branch 'pr/22'
Add missing test for fields_for with record object

See 7f2586b
Merge branch 'fix-fields-for'
Extract context class from AlertHelper
Extract context class from ModalHelper
Extract context class from PanelHelper
Merge pull request #27 from Fullscreen/extract-context-class

Extract context class
Add dropdown helper
Merge pull request #28 from claudiob/add-dropdown

Add dropdown helper
Better aria label for dropdowns
Merge branch 'add-dropdown'
Use markdown in yardoc

[ci skip] 43.33% documented
Merge branch 'fix-yard'
Add `progress_bar` helper
Merge pull request #29 from claudiob/add-progress-bar

Add progress_bar helper