Add github badges to README.md file.

[sunn-e]

Is your feature request related to a problem? Please describe.
Pease visit https://shields.io and add appropriate badges to README files across the repos.

Describe the solution you'd like
here's an example of how it looks.

You may add several such which are fancy and useful.
Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
https://shields.io