Add a missing contributor to the 0.6.3 release notes.
Add a missing contributor to the 0.6.3 release notes.

Nicolas Dély contributed some fies for Subversion, but was missing from
the release notes.

haosdent/rbtools,davidt/rbtools,davidt/rbtools,haosdent/rbtools,beol/rbtools,halvorlu/rbtools,reviewboard/rbtools,halvorlu/rbtools,beol/rbtools,reviewboard/rbtools,datjwu/rbtools,datjwu/rbtools,haosdent/rbtools,beol/rbtools,davidt/rbtools,halvorlu/rbtools,reviewboard/rbtools,datjwu/rbtools