Update Readme

Additional information gives the repo more context. Added the basics:
- [x] **Overview**: What problem does this project solve?
- [x] **Installation, Usage**: Requirements for installation and any other installation details. Example usage. 
- [x] **Contributing**: How to contribute to the project.   
- [x] **License**: How the code can be reused.

Other ideas for what to add: 
- [ ] **Contact**: Tell people who to contact for help.
- [ ] **Anything else?**