Improve accessibility

[heebj]

Unfortunately iCheck has some accessibility issues:

• Native element is not hidden for screen readers
• iCheck elements are not tabbable correctly
• iCheck elements do not have the same keyboard behaviour like the native elements
• ARIA support seems to be missing in v2

Please see the following examples of accessible radiobutton and checkbox widgets: http://www.oaa-accessibility.org/example/5/ http://www.oaa-accessibility.org/example/28/

Is there any chance this issues will be addressed in a future version? Thanks for your work!!