sm90 series command refs uploaded

Stuart P. managed to locate the full SM90 + SM105 + Fluke 860 series command reference docs, and you can now get them from the CVS under the directory techref, e.g.: http://scopegrab32.cvs.sourceforge.net/scopegrab32/scopegrab32/techref/

Now everyone interested in extending scopegrab32 for their own Scopemeter can do so or can program their own apps, too.