add title to jupyter notebook code example
Example 1: code in markdown jupyter
```python
print "Hello World"
```
o/p
print "Hello World"
Example 2: summation in jupyter markdown
$e^{i\pi} + 1 = 0$
```python
print "Hello World"
```
o/p
print "Hello World"
$e^{i\pi} + 1 = 0$