Remove unnecessary files.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Add windows support for randombytes()

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Fix int type portability.

We'll just use stdint.h instead - we'll be using a compiler with it
anyway, so this is easier and more sane.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Fix int types in sha512.c

Signed-off-by: Austin Seipp <aseipp@pobox.com>