main.cpp: Added cool progress bar. 1 problem.

TODO: Fix so that progress bar fills out completely and goes to 100%.
Only goes to 99.9 % now and loses last square.
dataReader.py: Started readerscript.

Sucessfully reads all times using regex.

In process of reading positions. Yet current idea is to use at least one
loop to loop through each particle per line. Better with some kind of
vectorization?