complete all implementation code

1.some bug was not fited yet.
2.add a model stages file to debug.
3.add a picture for test.
all codes are completed already

1. add some test imaege to the folder "data"
2. add FDDB roc test code in the folder "testTool".
3. add test code to instinctly show the detection result of FDDB
dataset.
4. fit some bug of the SurfFaceDetection class.