Test aria-required on checkbox collection input

[#780]
Test aria-required on collection radio button input.

[#780]
Test aria-required on collection select input.

[#780]
Test aria-required for datetime input.

[#780]
Test aria-required for hidden inputs.

[#780]
Test for aria-required on priority input.

[#780]
Include aria-required attribute on required fields.

[Closes #780]
Move aria-required option to html5 component.

[Finishes #780]
Merge pull request #781 from ckundo/780-aria-required

Include aria-required attribute on required fields
CHANGELOG

[ci skip]
Bundle update
Create an "aria-required" symbol instead of generating strings
Stylistic improvements
Add "By Plataformatec" after logo
Make FIELD_ERROR_PROC configurable

Minor change on field_error_proc

Make FIELD_ERROR_PROC configurable, activerecord helper to active model helper
simplify unsplatting syntax
Merge pull request #787 from prijutme4ty/syntax_simplification

simplify unsplatting syntax
Update travis-ci link in README [ci skip]
Setting custom field_error_proc test
Do not expect a controller to exist when looking up action