Merge pull request #44 from shahidhk/master

add logo credits

README.md

+
 ![Gitkube Logo](artifacts/gitkube-h-w.png)
 
 # Gitkube
@@ -145,3 +146,5 @@ This project has come out of the work at [hasura.io](https://hasura.io).
 Current maintainers [@Tirumarai](https://twitter.com/Tirumarai), [@shahidh_k](https://twitter.com/shahidh_k). 
 
 Follow [@gitkube](https://twitter.com/gitkube) to stay updated.
+
+Gitkube logo concept and design by [Samudra Gupta](https://www.linkedin.com/in/samudra-gupta-b6a3a238/).