Add UI component with QR-code generation

[dpereskokov]

Component should allow user to select coin from the set of coin addresses and display appropriate QR-code.

Site owner includes npm module as <script>, gets element TrustQRPay and triggers show method to show modal window.
Example usage:
<TrustQRPay id="tqr" ETH="0x32Be343B94f860124dC4fEe278FDCBD38C102D88" BTC="1F1tAaz5x1HUXrCNLbtMDqcw6o5GNn4xqX"></TrustQRPay>

or

<TrustQRPay id="tqr" 714="0x32Be343B94f860124dC4fEe278FDCBD38C102D88" 715="1F1tAaz5x1HUXrCNLbtMDqcw6o5GNn4xqX"></TrustQRPay>

And inside script tag:
document.getElementById("tqr").show()