Merge pull request #20 from ashwin31/master

Update README.md

Author: ashwin31

README.md

@@ -3,3 +3,9 @@
 ### standards to follow
 * two space indentation
 * images should have img_ prefix
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+[![](https://runcode-app-public.s3.amazonaws.com/images/dark_btn.png)](https://runcode.io)
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