Dongcai Huang StephenChips

## deepClone.js
/**
 * @author StephenChips
 *
 * Notes:
 * 1. There is no need to have a stack if the function is recursive.
 * 2. To ensure every object only has one copy, you have to use a Map to map the
 *    objects to their copies.
 * 3. Unlike toJSON, function deepClone should be able to handle cyclic objects.
 * 4. Some object cannot be clone (or doesn't have a relaible method) and should just
 *    return themselves directly.
	/**
	* @author StephenChips
	*
	* Notes:
	* 1. There is no need to have a stack if the function is recursive.
	* 2. To ensure every object only has one copy, you have to use a Map to map the
	* objects to their copies.
	* 3. Unlike toJSON, function deepClone should be able to handle cyclic objects.
	* 4. Some object cannot be clone (or doesn't have a relaible method) and should just
	* return themselves directly.