Allow passing of "value" parameter in options of checkboxes and radiobuttons

Added check to "options" subscriber to test for a value being passed to the checkboxes or radiobuttons type.

The idea is to allow the ability to pass the same value for multiple checkboxes like so:

	html : {
		type : 'checkboxes',
		caption: 'My cool test',
		options : [
			{name: 'foo', value: true},
			{name: 'bar', value: true}
		]
	}