Rebrand Hipstershop as OnlineBoutique (#328)

* update productcatalog, frontend, readme

* revert productcatalog

* restore currency logic and ad display

* footer cleanup

* Resize header image

* screenshots

* Center align header image in readme

* Show platform flag on every page

* style fixes

* fix currency in UI, remove extra USD

* cart bug, fixing

* attempt to fix breaking build

* fix cart size in handler

* replace images

* # items in cart is total quantity

* Add link to 0.1.4 manifests in readme

src/frontend/templates/error.html

@@ -1,12 +1,16 @@
 {{ define "error" }}
     {{ template "header" . }}
-
+    <div {{ with $.platform_css }} class="{{.}}" {{ end }}>
+        <span class="platform-flag">
+          {{$.platform_name}}
+        </span>
+      </div>
     <main role="main">
         <div class="py-5">
             <div class="container bg-light py-3 px-lg-5 py-lg-5">
                 <h1>Uh, oh!</h1>
                 <p>Something has failed. Below are some details for debugging.</p>
-                
+
                 <p><strong>HTTP Status:</strong> {{.status_code}} {{.status}}</p>
                 <pre class="border border-danger p-3"
                     style="white-space: pre-wrap; word-break: keep-all;">
@@ -17,4 +21,4 @@
     </main>
 
     {{ template "footer" . }}
-{{ end }}
+    {{ end }}