Clean-up and reorganize docs

[brylie]

Thank you for contributing to GeriLife. To maintain the quality of code please make sure of the following before merging a PR.

• [ ] Mentioned issues addressed in this PR.
• [ ] There are no code-climate issues or have been resolved before the PR is merged.
• [ ] Added test cases for new code
• [ ] All test cases are passing
• [ ] Have used multi-language string literal for all text messages.
• [ ] Included code comments