Update libsodium to 0.3
Update libsodium to 0.3

lmctv/pynacl,dstufft/pynacl,alex/pynacl,xueyumusic/pynacl,xueyumusic/pynacl,scholarly/pynacl,pyca/pynacl,ucoin-io/cutecoin,scholarly/pynacl,hoffmabc/pynacl,dstufft/pynacl,reaperhulk/pynacl,JackWink/pynacl,xueyumusic/pynacl,xueyumusic/pynacl,pyca/pynacl,reaperhulk/pynacl,pyca/pynacl,pyca/pynacl,ucoin-io/cutecoin,ucoin-bot/cutecoin,reaperhulk/pynacl,JackWink/pynacl,alex/pynacl,alex/pynacl,dstufft/pynacl,scholarly/pynacl,reaperhulk/pynacl,ucoin-io/cutecoin,pyca/pynacl,Insoleet/cutecoin,JackWink/pynacl,hoffmabc/pynacl,hoffmabc/pynacl,alex/pynacl,lmctv/pynacl,reaperhulk/pynacl,lmctv/pynacl,lmctv/pynacl,JackWink/pynacl,lmctv/pynacl,dstufft/pynacl,scholarly/pynacl