0.97
I have stopped using cout/cerr and never plan to use them again.  They caused
me significant pain when trying to get it going on an ancient SGI system.

Also changed the code structure a bit to make it cleaner.  One advantage of
this is that there is now a "-x" option to tell bonnie++ to run the same test
a number of times (it's interesting to see the variance in the results).

Now use fflush() after writing each set of results.  This means that killing
the program unexpectedly won't result in results being lost.  Also fixes a
strange bug related to printf() on Linux which I am still looking into.

