Revert "Revert "add project HuoDong""

This reverts commit 0dbcbf632143ba1b45e8fc9f06f6aa3e74953a35.

Conflicts:
	HuoDong/src/datapromotion/Promotion.java
	HuoDong/test/datapromotiontest/PromotionTest.java
Revert "Revert "Revert "add project HuoDong"""

This reverts commit 069d06f040946a4ce891ff22c17fbe13e7f51124.