[web2py] web2py 1.91.1 is OUT (LGPLv3)

[mdipierro]

web2py 1.91.1 is out, the first version with a new license.

Main changes are the license, bug fixes (compared to 1.90.*) and a new
shell that runs better than before and runs on GAE too, if you choose
to deploy it.

Massimo