Resolve "combine matchsalamander with ai"

Closes #18 (closed)

algorithm/main_src/dsift.py

 import numpy as np
 from cv2 import cv2
-from constants import width, height, step_size
+from algorithm.main_src.constants import width, height, step_size
 
 kp = [cv2.KeyPoint(x, y, step_size) for y in range(0, width , step_size) for x in range(0, height, step_size)]
 sift = cv2.SIFT_create()