Moved some calculations to init routine
Moved SMACK functions to smack.c
Added lots of comments to problem.c
Changed name of output_sizedist_append() to output_smack_sizedist()
Added output_smack_orbits() and output_smack_coordinates() to smack.c
Added input_smack_binary() and output_smack_binary() to smack.c
Pre-calculating fragdistsum
Minor precalculation