Update README.md

added readme content

Author: Mario Colque

README.md

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 # art
-🎨 Public branding assets for Beerpay
+
+This repository contains all kinds of branding assets for our products.
+
+## Source Files
+
+Contain designed states of what appears in the products. It can help when submitting a feature request to download the source file and mockup the feature you'd like to see implemented.
+
+_Requires macOS (OS X), Apple System Font ([San Francisco](https://developer.apple.com/fonts/)) and [Hack](http://sourcefoundry.org/hack/)._
+
+## Contribute
+
+1. [Fork](https://help.github.com/articles/fork-a-repo/) this repository to your own GitHub account and then [clone](https://help.github.com/articles/cloning-a-repository/) it to your local device
+2. Start making changes