Add packages to schooltool and zope packagesets

[Gediminas Paulauskas]

Hello,

A few packages were packaged by me and uploaded by sponsors. I only
have PPU access, so they need to be added to their respective
packagesets for me to be able to maintain them.

Please add the following:

zope packageset
---------------

z3c.pt
zope.sqlalchemy
zope.testrunner

schooltool packageset
---------------------

schooltool-book
schooltool.cando
schooltool.ldap

schooltool packages were added only for raring, and I already have new
releases of them.

Thank you.

--
Gediminas