Display reply info

app/src/components/tweet/tweet.html

@@ -1,5 +1,6 @@
 <ion-item text-wrap [class.private]="data.private_tweet">
   <p *ngIf="data.retweeted_status" class="retweet-info">{{ data.user.name }} has retweeted:</p>
+  <p *ngIf="data.in_reply_to_screen_name" class="retweet-info">Reply to @{{ data.in_reply_to_screen_name }}</p>
   <tweet-header [user]="user" [tweetCreatedAt]="createdAt"></tweet-header>
   <tweet-body [data]="data"></tweet-body>
   <tweet-actions [data]="data"></tweet-actions>