Update README.md

Author: bmarkov

README.md

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+[![Build Status](https://travis-ci.org/HTMLElements/smarthtmlelements-core.svg?branch=master](https://travis-ci.org/HTMLElements/smarthtmlelements-core)
+[![Published on webcomponents.org](https://img.shields.io/badge/webcomponents.org-published-blue.svg)](https://www.webcomponents.org/element/owner/my-element)
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 Build responsive, mobile-first projects on the Web with the most advanced front-end component library
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