Working on importing file from the web.
Also cleaned up error in library for OneFile
Requires a user input for the PDB via the console. Checks to see if the input exists as a PDB that is available to download, prompts to enter if invalid code is entered. If PDB is valid, the URL is read, and the data list is built and cleaned up.
Functions to find start of hetatm

Wrote functions to find the start of hetatm instead of searching
throughout the entire data list. Originally I wrote this because I
thought I might want to be check more than the [i][0] element of the
data list (where [i] is the current row), and some rows only have the
0th element. My original idea was to combine getStart... and getEnd...
coordinate functions, but this might not be the way to go because some
rows only have the 0th element.