…added -i option to denote interactive mode where the gui will be launched, requiring user interaction. by default, this script will simply output the plot (2d or 3d) automatically and write it to the directory where frames.bin was found (by default). added an option -o to specify an alternate output directory.

… explicit in the output print about what went wrong.

…d not address the fundamental issue of why the entity id was being shifted down by one and used as an array index. this needs to be reevaluated for a more in-depth reimplementation of how the data is stored in order to be processed (use a map instead of an array?) or if this script is really useful enough to maintain in the first place