bugfix, cleanup: simplify stopwatch logic and fix fallout The previous 2 commits (making the depth switch between surface and diving consistent) increased the time difference (in the simulator) to about 4 seconds. This commit fixes this again, and we are back at 1 sec. difference between the 2 timers (notice: in the simulator). Still not the wanted 0 sec. difference, but the old stopwatch logic logic was rather convoluted. Resetting to 1 second (instead of 0), and second-1 logic. Basically, this feels like a bug fixed with a second bug on top to mask it. The code is now much more logic and consistent (despite the fact that the real reason for the 1 sec. difference is not yet found). 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.