Updated fscc header file to match current releases, fscc.m still a work in
progress but henceforth only an up-to-date compiler should be used, as the
compiler released with MATLAB 2013b doesn't appear to support int64 or
int64_t, which are used in our library. fscc_set_register appears to work,
can be tweaked for optimization - fscc_get_register still a work in
progress.