Add client logos, markup

src/components/Header.js

@@ -1,6 +1,6 @@
 import React from 'react'
 import Link from 'gatsby-link'
-import SaburlyLogo from "../images/Saburly-Logo.svg"
+import LogoSaburly from "../images/logo-saburly.svg"
 import Button from './Button'
 
 import "./Header.css"
@@ -10,7 +10,7 @@ const Header = () => (
     <nav className="flex items-center justify-between lg:p-6">
       <div className="flex items-center flex-no-shrink text-white mr-6">
         <Link to="/">
-          <img src={SaburlyLogo} alt='Saburly Logo' style={{ maxWidth: '300px' }} />
+          <img src={LogoSaburly} alt='Saburly Logo' style={{ maxWidth: '300px' }} />
         </Link>
       </div>