Started system with moons.
readObjectsData.py: Added argparser.

Parser handles arguments much better. Script can now take filenames
instead of just looking up all files. Also, animation flag is better
implemented and xlim / ylim can be taken from command line.
main.cpp: Added cool progress bar.
sunEarthMoon.dat: Changed moon name to Luna.
readObjectsData.py: Fixed stuff.

Added fps argument.

Fixed xlim / ylim args.

Added function for skipping lines in data.
readObjectsData.py: Got rid of RAM improvement.

It messed everything up.
readObjectsData.py: Added option to follow object.

By specifying name of a celestial object the plotter can follow that
object via the plotting. Also, there is a radius argument that can
decide the radius of the tracker.
readObjectsData.py: Added option for grid.

Got crazy by it after a while.