README.md: Update content and fix issues
Add jenkins badge for master branch build status.
Rephrase introduction sentence.
Remove remainings from when the file was written in restructuredText.
Add syntax highlighting to code blocks.
Staging instance, all changes can be removed at any time
Add jenkins badge for master branch build status.
Rephrase introduction sentence.
Remove remainings from when the file was written in restructuredText.
Add syntax highlighting to code blocks.