Movied older files to 'old' folder.  Main file "0_3"
is now in the top folder.

Signed-off-by: gbathree <gbathree@gmail.com>
Added co2_evolution function for c3/c4 detector.
tracks co2 over several minutes.  Still needs work

Signed-off-by: gbathree <gbathree@gmail.com>
For Talia - doesn't have co2 measurement for the barebones
device.