yawa.c: handle flips
yawa.c: Exit with -2 on bad colors
yawa.c: Remove remains of old argument parsing
rename setRootAtoms to set_root_atoms to fit other names
parse_color: Use bool return-type, nuke PColor for Color*
Handle all arguments, split out int parsing function
Move parse_color to utils.c
yawa.h: Move argp variables to yawa.c
Remove space before function names