function contains( arr, v ) {
	var i;
	for ( i = 0; i < arr.length; i++ ) {
		if ( arr[ i ] === v ) {
			return true;
		}
	}
	return false;
}
Returns a boolean indicating if an array contains a provided value.

@private
@param {Array} arr - array
@param {*} v - search value
@returns {boolean} boolean indicating if an array contains a search value