Declare ge25519_base as extern, to prevent it from
becoming a common. Gets us rid of ``lignment 4 of symbol
`crypto_sign_ed25519_ref_ge25519_base' in mod_ge25519.o is smaller than 16 in
mod_ed25519.o'' warnings at link time.
[blocks.c ed25519.c fe25519.c fe25519.h ge25519.c ge25519.h]
[ge25519_base.data hash.c sc25519.c sc25519.h verify.c]
Add Authors for the public domain ed25519/nacl code.
see also http://nacl.cr.yp.to/features.html
All of the NaCl software is in the public domain.
and http://ed25519.cr.yp.to/software.html
The Ed25519 software is in the public domain.