Added literature review first draft for the progress report

progress_report/lit_review.tex

@@ -0,0 +1,28 @@
+\section{Literature Review}
+Since the start of our project, we have found multiple new information sources; 
+the following are the most important ones.
+\begin{itemize}
+\item Nodeunit documentation \\
+https://github.com/caolan/nodeunit \\
+% It might be better to put the URLs in the "References" section and add a [\ref{}] here
+We are using nodeunit to test our virtual machine.
+Since the c0 bytecode has many different opcodes that it uses, it is very easy
+for mistakes in the virtual machine to go unnoticed. 
+To prevent this, we are using the nodeunit library to write unit tests for our
+code.
+This has already helped us to find and solve multiple bugs in the VM, and having
+these unit tests will make sure that we can solve any bugs that occur as the
+result of future changes in the code.
+\item C0vm Assignment Handout \\
+https://www.cs.cmu.edu/~rjsimmon/15122-f14/prog/c0vm-writeup.pdf \\
+This document details how each opcode in the c0 bytecode language works,
+as well as other important implementation details for the c0 virtual machine.
+It has been an important reference while developing a JavaScript version
+of the c0 virtual machine.
+\end{itemize}
+So far, the most important thing we have learned is that good unit tests are
+vital for developing this sort of project. Without unit tests that verify 
+each opcode used by the virtual machine, many bugs would have gone unnoticed,
+causing problems later down the line. If we only found these bugs by using
+the frontend, they would have been much harder to debug, as there would have
+been much more code to work through.