Show Unknown seed/leech count on LastScrape == NULL, show scrape time

Instead of showing 0/0/0 when the torrent hasn't been scraped (which
may be misleading), show "Unknown", and also show when the torrent was
last scraped on the view torrent page.

templates/home.html

@@ -46,9 +46,13 @@
                   </a>
                   <span class="badge pull-right hidden-xs">{{ len .Comments }}</span>
               </td>
+              {{if .LastScrape.IsZero}}
+              <td class="hidden-xs" colspan="3" align="center">{{T "unknown"}}</td>
+              {{else}}
               <td class="hidden-xs"><b class="text-success">{{.Seeders}}</b></td>
               <td class="hidden-xs"><b class="text-danger">{{.Leechers}}</b></td>
               <td class="hidden-xs">{{.Completed}}</td>
+              {{end}}
               <td class="hidden-xs date date-short">{{.Date}}</td>
               <td class="hidden-xs filesize">{{.Filesize}}</td>
               <td class="hidden-xs">

templates/view.html

@@ -76,9 +76,15 @@
                     <div class="col-md-4">{{T "completed"}}</div>
                 </div>
                 <div class="row">
+                    {{if .LastScrape.IsZero}}
+                    <div class="col-md-12" align="center">{{T "unknown"}}</div>
+                    {{else}}
                     <div class="col-md-4">{{.Seeders}}</div>
                     <div class="col-md-4">{{.Leechers}}</div>
                     <div class="col-md-4"><span class="completed" style="">{{.Completed}}</span></div>
+                    <div class="col-md-4">{{T "last_scraped"}}</div>
+                    <div class="col-md-8">{{.LastScrape.Format (Ts "date_format")}}</div>
+                    {{end}}
                     <div class="col-md-8">
                         <div class="proSeedBar">
                             <div class="seeds" style="width: {{ calcWidthSeed .Seeders .Leechers }}%;"></div>

translations/en-us.all.json

@@ -746,5 +746,13 @@
   {
     "id": "please_include_our_tracker",
     "translation": "Please include udp://tracker.doko.moe:6969 in your trackers."
+  },
+  {
+    "id": "unknown",
+    "translation": "Unknown"
+  },
+  {
+    "id": "last_scraped",
+    "translation": "Last scraped: "
   }
 ]