It's a port of TweetNaCl (http://tweetnacl.cr.yp.to), which goal is to be tiny and auditable. If you compare C and JS implementations side-by-side, they look very similar (which was the major goal of this port).
For one the fact that (the author of NaCL) Daniel Bernstein is backing it.
I really doubt that, where does it say so?
AFAIK, he supported the TweetNaCl in C. That does not mean anything concerning this port.
DJB wrote the original tweetnacl.c, from which this JavaScript implementation is derived. He doesn't have anything to do with the port.
You guys are right of course; I was looking at the C version.