--- a/models/home.php	Mon Apr 13 15:43:59 2015 +0200
+++ b/models/home.php	Thu Apr 16 14:53:22 2015 +0200
@@ -1,16 +1,13 @@
 <?php
 
 class HomeModel {
-	public function Index() {
-		return array("Index Value 1", "Value 2", "Value 3");
-	}
     
-    public function Test() {
-
-    	
-        return;
-    }
     public function MergeBooksInfoToBooks() {
+        /** 
+        * This function is used to update book table in database. 
+        * It merged some fields in books_info table into books table, but it has not been used now.
+        */
+        
         /* uncomment to do the merge
         // merge books table with books_info table
         $query = "SELECT books_info.volume, books_info.author, books_info.edition, books_info.books_id FROM books INNER JOIN books_info ON books.id=books_info.books_id";