Add podcast and episodes templates

app/templates/episodes.hbs

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+<div class="episodes">
+  {{#each content=controller}}
+    <div {{action setEpisode this}} {{bind-attr class=":episode isNew"}}>
+      <div class="name">
+        {{#if isNew}}
+          <strong>{{episode.new}}</strong>
+        {{/if}}
+        {{name}}
+      </div>
+
+      {{!-- Commented out while we are streaming-only. This code exposes
+            download/downloading/play/stream UI, but for now we're streaming
+            only so we don't show anything.
+      {{#if HighFidelity.isPackaged}}
+        <div class="actions">
+          {{#if isDownloaded}}
+            <i class="fa fa-play-circle"></i>
+          {{else}}
+            {{#if isDownloading}}
+              <i class="fa fa-spinner fa-spin"></i>
+            {{else}}
+              <i class="fa fa-cloud-download" {{action download this}}></i>
+            {{/if}}
+          {{/if}}
+        </div>
+      {{/if}}
+      --}}
+    </div>
+  {{else}}
+    {{render "spinner"}}
+  {{/each}}
+</div>

app/templates/podcast.hbs

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+<div class="podcast">
+  <img class="cover-image" {{bind-attr src=model.coverImageURL}}
+               {{bind-attr alt=model.title}}>
+
+  <p>{{model.description}} {{model.lastUpdated}}</p>
+
+  <button {{action delete}}>Unsubscribe</button>
+  {{!--
+  <p>Last updated: {{lastUpdated}}</p>
+  --}}
+</div>
+
+<hr/>
+
+{{render "episodes" model.episodes}}
+
+{{outlet}}