Merging changes back into original repository

[chiragsakhuja]

I just found this fork of LC3Tools and it looks like y'all have made quite a few thoughtful additions and bugfixes. Thank you for supporting the project to make up for my lack thereof!

I'm wanting to merge your changes back into main repository, but I have a couple of questions before doing so.

1. Is master in this repository guaranteed to be stable?
2. Have any changes been made that deviate from the ISA defined by the textbook? For example, are there any changes made to adapt the simulator to teaching decisions for CS 2110?