updates octave scripts: trigger initial Corblivar run only when no solution file is found, (re)introduced TSV density as command line parameter
updates class FloorPlanner: delete solution file in case no valid solution was generated
udate octave script: cleanup and minor fixes optimization.m
updates octave scripts: drop validity check for phase 2, so that any solution can be found
for layouts w/ large temperature gradients; further minor updates parameters and cleanups