Happy Belated 25th Anniversary

[gbrail]

I recently had a look at the oldest commit in this repo, by @norrisboyd:

C:\Users\greg\src\rhino>git log --reverse
commit df654e871e2547e30f10321d86a3956c5d0023e1
Author: norris%netscape.com <norris%netscape.com>
Date:   Mon Apr 19 20:43:07 1999 +0000

    Publish Rhino as open source.

That means that we are belated in celebrating Rhino's 25th anniversary.

Congratulations and thanks to all the people who contributed over the years!