Add nansen logo

studio/plugins/muna-logo/Logo.css

 .logo {
   display: inline-block !important;
   height: 100%;
-  max-height: 2em;
+  max-height: 1em;
+  margin-right: 0.5em;
 }

studio/plugins/muna-logo/Logo.js

 // React is installed in the studio and should be treated as a peer dependency
 import React from 'react'
-import {SeidhrIcon} from '@seidhr/react-muna-logo'
+import nansenLogo from './logo.png'
 import styles from './Logo.css'
 
 // We recommend using SVGs as they have both a small footprint and scale well
 // const Logo = () => 'ᛗᚢᚾᚨ'
 const Logo = () => (
   <div>
-    <SeidhrIcon className={styles.logo} /> ᛗᚢᚾᚨ
+    <img src={nansenLogo} className={styles.logo} /> 
+    <strong>
+      Nansen
+    </strong>
   </div>
 )