Added support for radio buttons
Added :inline option to #check_box and #radio_button helpers
Refactored the way that is generated the div.control-group tag
Updated the #control_group helper

Added more control over the label element generated by it and reusing
the method inside the class avoiding duplicated code
Updated the #check_box and #radio_button helpers

They aren't automatically wrapped by the div.control-group anymore
#control_group accept options for the div.control_group tag
Fixed bootstrap_form_test file

Removed a line causing error (it was commited by mistake)
Merge pull request #6 from carloslopes/radios-and-checks

Wrapping #radio_button tag, new feature for #check_box and refactored some code