function isProbability( value ) {
	return ( isPrimitive( value ) || isObject( value ) );
}
Tests if a value is a probability.

@param {*} value - value to test
@returns {boolean} boolean indicating whether value is a probability

@example
var bool = isProbability( 0.5 );
// returns true

@example
var bool = isProbability( new Number( 0.5 ) );
// returns true

@example
var bool = isProbability( 3.14 );
// returns false

@example
var bool = isProbability( -5.0 );
// returns false

@example
var bool = isProbability( null );
// returns false