Consolidate Overview and Introduction chapters
- Move overview and introduction files into a single folder
- Remove about_this_book.md We can add a guide to contributing to documentation, and mention the book there.
- Remove heartbleed case study This has been a stubbed out article for ~3 years. We might consider an article like this for a technical white paper, or a blog post, if someone gets inspired.
- Stub out design/drivers and design/memory files
- Remove will redox replace linux
- Differentiate: Philosophy, Why a New OS, Goals