STELLAR module: issues with output density

[jbirky]

I found two issues with the density output using the STELLAR module:

1. Density is listed under 'system properties' in the output log file instead of 'stellar parameters'
2. The log file says that the density is in solar units, but it's actually a factor of ~12 off from solar (see plot)

plot:

infiles and log:
star.txt
vpl.txt
Trappist.log