Fix whash for images with invalid sizes, add remove_ll option for whash, remove multi hash

bench/README.md

@@ -30,6 +30,3 @@ fastimagehash v0.1
 ![ahash_s](results/ahash_small.png)
 ![ahash_l](results/ahash_large.png)
 
-**multi_hash**
-![multi_s](results/multi_small.png)
-![multi_l](results/multi_large.png)

bench/benchmark.py

@@ -37,15 +37,3 @@ print_result("ahash", timeit.timeit(
     number=COUNT
 ))
 
-print_result("multi", timeit.timeit(
-    setup="from imagehash import average_hash,phash,whash,dhash \n"
-          "from PIL import Image",
-    stmt="im = Image.open('%s');"
-         "size = %d;"
-         "average_hash(im.copy(), hash_size=size);"
-         "phash(im.copy(), hash_size=size);"
-         "whash(im.copy(), hash_size=size, remove_max_haar_ll=False);"
-         "dhash(im.copy(), hash_size=size);"
-         % (IMAGE, SIZE),
-    number=COUNT
-))

bench/run.py

@@ -34,6 +34,4 @@ for f in files:
                 method = "ahash"
             if "whash" in m:
                 method = "whash"
-            if "multi" in m:
-                method = "multi"
             print("%s_%s,%s" % (f, method, t))