Enzyme Release v0.6.2 of Big Enzyme

I have just released yet another version of Big Enzyme, get it while it's
hot. This is mainly just a documentation upgrade, with the added Data
Entry feature where an admin can register as a student without having to
wait for emails to arrive. See the CHANGES file for details.

Many thanks to Mike Mylonas for his contributions to the documentation!
Mike cleaned up, corrected and added to INSTALL, README.adm and in fact
added the CHANGES file.