Get the nethack page looking good again

Update all the CSS classes and fix the layout so it looks good in the new theme.
Convert a bunch of CSS classes to BEM style.

layouts/shortcodes/nethack/best_game.html

@@ -3,7 +3,7 @@
 {{ range $nethack_data }}
   {{ $logfile = $logfile | append .logfile }}
 {{ end }}
-<ol class="logfile">
+<ol class="nethack-logfile">
   <li>
     {{ partial "nethack/logentry.html" (index (sort $logfile "score" "desc") 0) }}
   </li>

layouts/shortcodes/nethack/logfile.html

@@ -1,10 +1,9 @@
 {{- $logfile := partial "nethack/log.html" . -}}
-<ol class="logfile">
-  {{ range sort $logfile "end_date" "desc" }}
-  {{ if ne .death.cause "quit" }}
-  <li>
-    {{ partial "nethack/logentry.html" .}}
-  </li>
-  {{ end }}
+{{- $logfile = where $logfile "death.cause" "ne" "quit" -}}
+<ol class="nethack-logfile">
+  {{ range sort $logfile "end_date" "desc" -}}
+    <li class="nethack-logfile__entry">
+      {{ partial "nethack/logentry.html" .}}
+    </li>
   {{ end }}
 </ol>

layouts/shortcodes/nethack/topn.html

@@ -1,7 +1,7 @@
 {{- $n := .Get 0 -}}
 {{- $logfile := partial "nethack/log.html" . -}}
-<ol class="logfile topn">
+<ol class="nethack-logfile  nethack-topn">
   {{ range first $n (sort $logfile "score" "desc") -}}
-    <li>{{ partial "nethack/logentry.html" . }}</li>
+    <li class="nethack-logentry">{{ partial "nethack/logentry.html" . }}</li>
   {{- end }}
 </ol>