feature: replace Relative GF by saturation, computational only Replace Relative GF by saturation. The saturation code is derived from the hwOS repo. This commit only contains the Buhlmann computational part. In the simulator, the numbers does look sane. The initial ascent from the bottom phase stops at the deepest deco stop a little over GFlow, which is correct in my view, as we still have some time to spend on this deepest stop, and that stop ends very close to GFlow (obviously, a deepest stop is typically short, as in 1 or 2 minutes). The deco finally ends at the surface with a saturation value of GFhigh. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>

README.linux
------------

1. Compile the pack utilities

cd src
make checksum_final_add_fletcher
make OSTC4pack_V4

2. Edit create_full_update_bin.sh

Set BUILD_PATH to the location where you build the individual parts
of the firmware using the OpenSTM23 IDE. 

Set BUILD_TYPE the either Debug or Release (or any other build style you 
defined in the OpenSTM23 IDE).

Set the "build project names" as defined in the OpenSTM23 IDE.

3. Simpy run create_full_update_bin.sh

Run it in the ostc4pack folder of the repository, and a file with name
like OSTC4_<date>.bin is created containg the individual blobs.