changes in dataformat

[sihyunjeon]

1. 16b might possibly change into 32 or 64b (basically appending 2 or 4 lines into one)
2. Chip offsets and module offsets link : It seems like it's possible to store module offsets instead of chip offsets (in packer/unpacker point of view) which then saves the overall data rates in the end, since chip offsets can be picked up from the chip data blocks