Tweak input csv file

This commit convert irregular data format in the input file (obtained from the
testing device) into properly organized time-series data. Time searies data for
each channel is saved in separate .csv output file.

It eliminates the complexity of reading input data from source .csv file.
Without tweak, the tasks would require lengthy and tedious .csv read-in
codifications.

Signed-off-by: Bryan Spencer <bumpy.otter@yandex.com>