Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Latest version of this package from Wolfram. Is now /etc/sysconfig aware,
handles default settings and has a prototype translation file for people
wishing to add extra languages (please!).
Submitted by: Wolfram Schneider <wosch@cs.tu-berlin.de>