I made a condensed Table of Contents format for the main github README.md in order to streamline the process for newer users. I found links to be repeated in some spots (src/test/README.md and /test in Automated Testing). The same information can be found elsewhere and in more context simply by visiting the link to the location needed by the user. The formatting is now similar to the documentation README.md
I added a separate file for Testing in order to not take up more space than necessary in the ToC.