Redefine Deco gas creation function: The old function needed a lot of iteration to get through all gases. With the change to define the first gas in PSCR mode as deco gas for calculation (because the actual gas could be not breathable close to surface => deco planing would be based on > 80% nitrogen increasing the deco prediction higher than necessary) the need showed up to somehow define the first gas as deco gas. Instead of manipulating the gas attribute the deco list creation function was changed to create the list based on gas line pointer information instead of index lists. The new function needs less iterations for sorting and is more flexible regarding gas handling.

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.