function isEmptyString( value ) {
	return ( isPrimitive( value ) || isObject( value ) );
}
Tests if a value is an empty string.

@param {*} value - value to test
@returns {boolean} boolean indicating whether value is an empty string

@example
var bool = isEmptyString( '' );
// returns true

@example
var bool = isEmptyString( 'beep' );
// returns false

@example
var bool = isEmptyString( [] );
// returns false