Import logo stylesheet before applying custom css

This fixes #551, and allows custom css to be applied to the Whoogle
logo.

app/templates/display.html

@@ -5,6 +5,7 @@
     <link rel="search" href="opensearch.xml" type="application/opensearchdescription+xml" title="Whoogle Search">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta name="referrer" content="no-referrer">
+    <link rel="stylesheet" href="{{ cb_url('logo.css') }}">
     <link rel="stylesheet" href="{{ cb_url('input.css') }}">
     <link rel="stylesheet" href="{{ cb_url('search.css') }}">
     <link rel="stylesheet" href="{{ cb_url('header.css') }}">

app/templates/index.html

@@ -21,6 +21,7 @@
     <script type="text/javascript" src="{{ cb_url('controller.js') }}"></script>
     <link rel="search" href="opensearch.xml" type="application/opensearchdescription+xml" title="Whoogle Search">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link rel="stylesheet" href="{{ cb_url('logo.css') }}">
     {% if config.theme %}
         {% if config.theme == 'system' %}
             <style>

app/templates/logo.html

@@ -1,4 +1,3 @@
-    <link rel="stylesheet" href="{{ cb_url('logo.css') }}">
     <svg id="Layer_1" class="whoogle-svg" data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1028 254">
         <defs>
             <style>
@@ -17,4 +16,3 @@
         <path class="cls-1" d="M950.51,539.43c-.31,20.82-10.91,37.89-28,44.71-25.32,10.11-53.89-7-57.87-34.41-1.51-10.43-1.06-20.59,2.68-30.44,7.08-18.66,25.09-29.59,45-27.58,17.76,1.79,33.92,17.68,36.86,36.35C949.79,531.82,950.08,535.64,950.51,539.43Z" transform="translate(-446 -413)"></path>
         <path class="cls-1" d="M1099.71,539.39c-.39,22.14-11.74,39.51-30.16,45.6-25.8,8.54-53.64-10.27-55.87-37.67-.78-9.54-.55-18.93,3-28,7.25-18.72,24.95-29.59,45-27.62,17.2,1.68,33.14,16.78,36.57,34.84C1099,530.77,1099.23,535.1,1099.71,539.39Z" transform="translate(-446 -413)"></path>
     </svg>
-</a>