Tests: Aborting SVD test after first failure.

This test did not return an error code and was hence incorrectly flagged as successful.
What a shame! :-/
SPAI: Fixed wrong size of copy to device for dynamic update.

Reported by: Andreas Rost (IHU GmbH)
Tutorials: Now using BOOST_UBLAS_NDEBUG instead of NDEBUG.

The slow uBLAS doesn't need to bring down all the good debugging features globally.