Take water vapor pressure into account again for deco

In the transition to the partial pressure helper function,
the water vapor component of the breathing gas had been dropped.
This had a significant effect on deco times for deep dives.

Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Support for importing Poseidon MK6 logs

This patch adds support for importing the logs from a Poseidon MK6
rebreather. This DC produces logs that contain of a .txt file that has
all the meta data and a .csv file that contains the sample readings. The
CSV file is different from the others in that it has a line per each
sample reading at given time. Thus we have to merge all the lines from
one point in time into one sample reading of ours.

[Dirk Hohndel: addressed some compiler warnings]

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Make the buffers const char *

Addresses a warning, but also seems more correct.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>