label_text for wrapper
rename variable label_text
add test for label_text method
Add :translate setting for include_blank and prompt
Allow i18n key for include_blank and prompt
Allow :t as a shorthand for :translate
Pluralize namespace for consistency
1.9 hash syntax
Fix the way `detect_common_display_methods` finds label & value methods

It was previously looking at an instance of the `collection` instead of the
`collection_classes`. Since the grouped collection input supplies a list
of collection classes that differ from the regular collection, it was
incorrectly looking for labelling and value methods on the option
instances, rather than the optgroup instances.
Added the ability consider whether the the user exlicitly specified the label or the framework generated it when applying global custom formatting.
Cache the test for parameters size of label_text for better performance.
Changed call to label_text to always pass the new thrid parameter, and made the default a proc that ignores it. This is a breaking change.
Possibility of specifying additional html attributes to 'wrap'
Improve CONTRIBUTING.md guide.

Add some line breaks(better when reading in the editor) and use markdown syntax for ordered lists.
Also, added a title.
Merge pull request #977 from sadjow/improve-contributing-guide

Improve CONTRIBUTING guide.
Fix Simple Form Foundation generator to use correct class with error
Add docs badge to README
Run tests on Ruby 2.1.1
Update rails related dependencies
Run tests against Rails 4-1-stable