docs: Added coverage badge

Author: adrianlasota

README.md

@@ -4,6 +4,7 @@
 # MFD Connect
 **Module for running commands on remote machine.**
 
+[![Coverage Status](https://coveralls.io/repos/github/intel/mfd-connect/badge.svg)](https://coveralls.io/github/intel/mfd-connect)
 ## Usage
 ```python
 from mfd_connect import LocalConnection
@@ -1112,4 +1113,4 @@ If code cannot establish connection, it will start deployment of python using [D
 
 ## Issue reporting
 
-If you encounter any bugs or have suggestions for improvements, you're welcome to contribute directly or open an issue [here](https://github.com/intel/mfd-connect/issues).
+If you encounter any bugs or have suggestions for improvements, you're welcome to contribute directly or open an issue [here](https://github.com/intel/mfd-connect/issues).