Cluster: Sage Chroot

In order to chroot the Sage notebook, I used a mix of steps from the following guides:

• http://www.msri.org/about/computing/docs/sage/inst/node4.html
• http://www.mail-archive.com/sage-support@googlegroups.com/msg01201.html
• http://groups.google.com/group/sage-support/msg/849e906146b41d28?pli=1
• http://www.mail-archive.com/sage-devel@googlegroups.com/msg03545.html