the Makefile now builds all artifacts, including final output s37 and
bin files under "build" so as to not clutter up the root directory
and making it easier to gitignore all build artifacts now and into the
future.
as well, the Makefile now has a new target to invoke srec2bin.py for us
to build ready-to-flash artifacts
srec2bin.py has been updated to be more flexible and do some minimal
argument error checking. it now also will output a CSV file for use
with FoenixMgr's flash-bulk option. this is useful as the number of
8k bin files can and will vary now and into the future, especially if
you are building with -O2 optimizations for size, etc.
Gered
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