vysmaw app overwriting some data values

[Casey Law]

vysmaw_reader chooses indexes in time, baseline, channel, and pol. The logging statement about twice-written fields is triggered sometimes.

data value alread set at 12 191 192 1
data value alread set at 11 191 192 3
data value alread set at 10 191 192 3
data value alread set at 9 191 192 3
data value alread set at 8 191 192 3
data value alread set at 7 191 192 3
data value alread set at 6 191 192 3
data value alread set at 5 191 192 3
data value alread set at 4 191 192 3
data value alread set at 3 191 192 3
data value alread set at 2 191 192 3
data value alread set at 1 191 192 3
data value alread set at 0 191 192 3

Not clear what the pattern is yet, but it may be tied to "missing" spectra ( #26 )

[Casey Law]

This is related to the alignment of the timearr in vysmaw cilent. Shifting by 0.5 bin seems to remove the issue.