Update docs
- addons: mention included lists by default and remove all suggested lists as a consequence.
- faq: mention that strict mode is important, add guidance for new issues, mention that we are not working on mobile builds.
- features: reflect main changes in new version.
- security and settings: minor changes.
- testing: add privacytests, mention creators and add descriptions, remove coveryourtracks as it doesn't provide anything more than other tests and the numbers it produces are stupid and misleading.