Adds support for HLLC fluid step solver; Update makefile to remove by default the ptxas chatter.
Remove unused .thresholdArray property.
Set default CFL to 0.35 instead of 0.7 due to new Riemann solver requiring cfl < 0.5;
Return cudaFreeRadiation to its original point-value form and do not attempt any cute polynomial extrapolations.
Fix log printed typo