JavaCC Licensing - now a pure BSD license.

[Paul Cager <paul@paulcager.org>]

The authors of JavaCC have now re-licensed the JavaCC code under a pure
BSD license (http://www.opensource.org/licenses/bsd-license.html). This
should clear up the doubts some organisations have had regarding the
"Nuclear" and "Weapons" clauses in the original license, and the export
restrictions imposed therein.

Many thanks to the following authors who gave their permission for the
relicensing: Sun Microsystems Inc, Sreenivasa Viswanadha and Kees Jan
Koster.

The updated source code has now been committed to the JavaCC CVS repository.