Add "ccache" to the things that need to be installed using macports.
save and restore *raise and *lower rather than just unilaterally setting
More cleanup for arithlin and fftmod.cpp
SOme fixes following my namespace work...
Activating FFT multiplication *still not ideally optimised) for
Here I tidy up after ye4sterdays big checkin so that now the --with-arithlib
A load of CSL files are changed here nut at least in principle not a lot
Instead of using the C++ "high_resolution_clock" I now used the "steady_clock"