Added images and more details to README

README.md

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 # PyInt
 
 PyInt is a Python Interpreter based on the Clox interpreter by Bob Nystrom from https://craftinginterpreters.com/
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+![REPL mode](https://github.com/ShaunMitchell98/PyInt/blob/master/Images/REPL.png)
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+By default, when you run the executable it starts a REPL, where you can run code quickly. By passing arguements, you can get additional output such as the executed bytecode and the state of the stack.
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+![REPL with Executed Bytecode](https://github.com/ShaunMitchell98/PyInt/blob/master/Images/REPL%20with%20Execution%20Output.png)
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+The output doesn't have to be to the terminal, output can be redirected to a file by replacing t with f and adding the file path as the next input, for example: 
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+![Execution Output to File](https://github.com/ShaunMitchell98/PyInt/blob/master/Images/REPL%20with%20Execution%20Output%20to%20File(1).png)
+![](https://github.com/ShaunMitchell98/PyInt/blob/master/Images/REPL%20with%20Execution%20Output%20to%20File(2).png)
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+As well as writing commands in the terminal, you can run a file using the arguement -fi and passing the filepath:
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+![File Input](https://github.com/ShaunMitchell98/PyInt/blob/master/Images/Text%20File%20Input(1).png)
+![](https://github.com/ShaunMitchell98/PyInt/blob/master/Images/Text%20File%20Input(2).png)