Vagrant for Tusk end-to-end (in progress)

Move around scripts as per programmer discussion.
* bin for database scripts
* install/bin for install-related scripts meant to be
  run by installer.
* install/centos-5.8 for CentOS 5.8-specific scripts.
* install/vagrant for Vagrant-specific scripts.
* install/scripts for miscellaneous scripts (work in progress)
Finish Vagrantfile for CentOS 5.8

Everything working soup to nuts with vagrant up.
Move mason_cache to /var/www/mason_cache and update
tusk.conf, mason.pl and mason_nosession.pl.