TweetNaCl port

[ketmar via Digitalmars-d-announce]

this is quick-and-dirty port of TweetNaCl to D. it's not a proper 
'D rewrite' of TweetNaCl, it still shows it's C roots, but it 
works. and it has test suite and ddoc which original TweetNaCl 
lacks.

WARNING! API is subject to change. but you can take the current 
version and use it as-is if the current API is ok for you.

http://repo.or.cz/w/tweetnacl.d.git

p.s. somehow i have feeling that somebody already did that and i 
failed my google-foo again.