Add links & credits for NaCl and libuv.

Author: jedisct1

AUTHORS

@@ -1 +1,13 @@
+NaCl
+----
+see http://nacl.cr.yp.to/ for more info about this library and the
+list of contributors.
+
+libuv
+-----
+see https://github.com/joyent/libuv for more info about this library
+and the src/libuv/AUTHORS file for the list of contributors.
+
+dnscrypt
+--------
 Frank Denis <frank at opendns dot com>