OPENUCB-106, OPENUCB-473

* OPENUCB-473
** Upgrade to phpCAS 1.3.3. https://www.mail-archive.com/cas-user@lists.jasig.org/msg17338.html
* OPENUCB-106
** Prevent activation emails sent when accounts are unblocked
* Improve rebuild.sh: Parse version from .info and create tarball
* Makefiles changed to use github.com/bwood. (Will change back to ucb-ist-drupal after open source petition.)