Updating Repository's ReadMe.md with A project Description, Table of Contents, and More

[neevasethi]

This Pull Request contains the following changes in ReadMe.md:

1. New Table of Contents that is interactive with tags to each section
2. A thorough description of what types of files this code is used on, why those files are used, why this specific code is relevant, and when and why to use it
3. A file structure subsection that includes an overview of the things that can be found in the main 3 files
4. Updates to the formatting under downloads to enhance user readability
5. A more detailed description of the dependency needed

[ticofab]

Thanks @neevasethi !