Changes include:
- Add diagrams of the operation of different consistency modes
- Note that only stale reads benefit from horizontal scaling
- Increase scannability with headings
- Document consistency mode defaults and how to override for
DNS and HTTP API interfaces
- Document X-Consul-Effective-Consistency response header
* website: migrate to new nav-data format
* website: clean up unused intro content
* website: remove deprecated sidebar_title from frontmatter
* website: add react-content to fix global style import issue
Jared Kirschner