Added titles

Author: snrazavi

01-OOP-Basics.ipynb

@@ -1,5 +1,16 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "source": [
+    "<div class=\"alert alert-info\">\n",
+    "    <h1 align=\"center\">Basic Concepts: Classes and Objects</h1>\n",
+    "    <h3 align=\"center\"> Object-Oriented Programming in Python</h3>\n",
+    "    <h5 align=\"center\">Seyed Naser Razavi (http://www.snrazavi.ir/)</h5>\n",
+    "</div>"
+   ],
+   "metadata": {}
+  },
   {
    "cell_type": "markdown",
    "source": [

02-OOP-instance_variables_vs_class_variables.ipynb

@@ -1,5 +1,16 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "source": [
+    "<div class=\"alert alert-info\">\n",
+    "    <h1 align=\"center\">Instance Variables and Class Variables</h1>\n",
+    "    <h3 align=\"center\"> Object-Oriented Programming in Python</h3>\n",
+    "    <h5 align=\"center\">Seyed Naser Razavi (http://www.snrazavi.ir/)</h5>\n",
+    "</div>"
+   ],
+   "metadata": {}
+  },
   {
    "cell_type": "markdown",
    "source": [