Add following/followers lists

closes #25

mastodon/src/main/java/org/joinmastodon/android/model/HeaderPaginationList.java

@@ -0,0 +1,24 @@
+package org.joinmastodon.android.model;
+
+import android.net.Uri;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import androidx.annotation.NonNull;
+
+public class HeaderPaginationList<T> extends ArrayList<T>{
+	public Uri nextPageUri, prevPageUri;
+
+	public HeaderPaginationList(int initialCapacity){
+		super(initialCapacity);
+	}
+
+	public HeaderPaginationList(){
+		super();
+	}
+
+	public HeaderPaginationList(@NonNull Collection<? extends T> c){
+		super(c);
+	}
+}