Log Message:
Update to newest version, including security fixes.

ChangeLog from last version:

SECURITY
========
* Close several XSS vulnerabilities in topic administration page.  This
  resolves CVE-2012-2768.
DOC
===
* Clarify that the only version incompatibility is 3.8.0; 3.8.x for
  values of x != 0 is fine.
* Note incompatibility with RT 4 and above, which already include RTFM
  functionality as "Articles"

XXX: for now disable copying of PO files, they conflict with RT ones.