added face detection opencv code
DetectFace.cpp is the c++ code implementing face detection
It gets a string location of an image file and returns a string of processed image location
DetectFace.cbp is a code::block ide file that I use to compile the detectface.cpp

Haarcascade *.xml is a file used for opencv face detection algorithm.
added a picture to test the result of the cpp face detection code
(obama family picture)
Merge pull request #1 from jtsai24/master

Hey Xinquan, let us see if this works