More datafiles
Added notes for the datafiles (usage, problems...)
update l8_lbw8 scripts and some datafiles. More to come (notes, comments, etc.)
ver121_01 has only one subband actually so moved related files.
Bug fix for channelshape() function in h1k_hbw script. New datafiles added.
Added more datafiles (h1k_hbw channel shape)