Add files for new mining algorithm

- blake.c, bmw.c, groestl.c, jh.c, keccak.c, and skein.c
- sph_blake.h, sph_bmw.h, sph_groestl.h, sph_jh.h, sph_keccak.h,
sph_skein.h
- sph_types.h
- hashblock.h
Change hashing algorithm

Change “scrypt_blockhash” to “Hash9”