include test code in the repository

[Andrei Pozolotin]

Hello 王一 WangYi.

1. I implemented python/cython wrapper for the "test vectors for portability test":

wyhash/wyhash.h

Line 194 in b5b0aa2

 /* test vectors for portability test 

wyhash("",0,_wyp)=42bc986dc5eec4d3
wyhash("a",1,_wyp)=84508dc903c31551
wyhash("abc",2,_wyp)=bc54887cfc9ecb1
wyhash("message digest",3,_wyp)=adc146444841c430
wyhash("abcdefghijklmnopqrstuvwxyz",4,_wyp)=9a64e42e897195b9
wyhash("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",5,_wyp)=9199383239c32554
wyhash("12345678901234567890123456789012345678901234567890123456789012345678901234567890",6,_wyp)=7c1ccf6bba30f5a5

2. surprisingly, the test works fine (value matches) for 6 out of 7 entries, and fails on this one (hash does not match):

wyhash("message digest",3,_wyp)=adc146444841c430 // I have value 6e2ff3298208a67c

3. hence, can you please:
   a) verify hash value for this case?
   b) include your test code in the repository?

Thank you.

[王一 WangYi]

Yes, it is my bug due to the delayed update of test vectors.
we have test_vector.cpp in this repo to generate test vectors.
Thank you!