Various improvements

Renamed all functions that get information to "get_blah()" as opposed to
"blah()" to avoid errors and to create clarity.
Gave all functions default values for their prompts.
Changed wait() to now have a last_word argument that defaults to
"continue." It's used to choose the text past the "Press any key to "
text in the prompt as one might desire "exit." in some cases or
"continue." in others.
Lastly, added a section of code that runs if __name__ == "__main__" that
directs to the GitHub page if the user wants it to.