2013-07-25
Use 3 standard deviations, instead of two, when checking results
in randn C++ example
(because two standard deviations was failing to often).
2013-07-20
Added the mztuni
function so that random number generation
was repeatable on different machines.
In addition, seeded the random numbers off the clock
so that a different test is run each time (but can be reproduced
in the case of an error).
