Only load pieces of libraries that are used to speed up processing time

[TechnologyClassroom]

Decrease runtime by only loading pieces of libraries that are used in dicemechanicsim.py and plotdicemechanic.py. Instead of lines like this:

import csv
import pandas as pd

Check which pieces are actually used an only import those pieces with imports like this:

from argparse import ArgumentParser
from random import randrange

Make sure to adjust usage of those library calls as the syntax changes and test that the program still works.