Common blocks

COMMON fileblock, nfiles, folder, flabel, nruns, nbomit, nwomit
COMMON fitsblock, time, wave, spec, nwave, nspec
COMMON procblock, specf, specr, specm
COMMON pspecblock, freq, twod_dft
COMMON xcorblock, ccfx, ccfy, ccf2y, ccf2n, nccf, afits, template