Bump copyright for the first 2013 release

Also update the Footer.
Bump version for 3.8.16rc1
The second of these (Requestor.EmailAddress) was failing on 5.8.8

I'm sure this is some awesome little perl bug, but since it's in the
test suite and on an unsupported perl version, I'm not willing to dig
terribly deep since this fixes it.
Remove the "signature" paragraph from the README's explanation of RT

At one time (circa 2003) this made sense, but the explanation doesn't
need to read like a letter anymore.  There's a whole team behind RT now,
and it's one less "out of date" date to boot.

Conflicts:
	README
Bump version for 3.8.16
Merge branch '3.8.16-releng' into 3.8-trunk