Add last commit/stars info badges to repos from shields.io

[mattl-lr]

It would be useful to see how active/popular each project is using https://shields.io/badges

Examples:
Stars:

![Alt Text](https://img.shields.io/github/stars/exakat/php-static-analysis-tools)

Most recent commit:

![Alt Text](https://img.shields.io/github/last-commit/exakat/php-static-analysis-tools)

[exakat]

Indeed, some of these tools have been abandonned and might have to go away, while others are actively being worked.

The badge suggestion applies only to github repos, so that is already half the job there.