added whole SHA2 family from http://reikon.us/sha2/
treec74d0d39672c50149bb98adef920d249b6bbf4c9
-rw-r--r-- 52 .gitignore
-rw-r--r-- 1666 LICENSE
-rw-r--r-- 2609 README
-rw-r--r-- 355 setup.py
drwxr-xr-x - src
drwxr-xr-x - test