Pandas dataframe no longer displaying automatically

[SimonBiggs]

Pandas dataframe used to display automatically, now need to wrap in ipython display function.

[SimonBiggs]

The issue seems to be that execute results only display when another output has also been displayed:

<section-start>
    
```python
import pandas as pd
```
    
</section-start>


<section-start onLoad>
    
```python
print('boo')

pd.DataFrame(columns=['hello'], data=[1])
```
    
</section-start>


<section-start onLoad>
    
```python
pd.DataFrame(columns=['george'], data=[1])
```
    
</section-start>

<section-start onLoad>
    
```python
"this won't display"
```
    
</section-start>

<section-start onLoad>
    
```python
print('foo')
"this will"
```
    
</section-start>

[SimonBiggs]

Released 0.10.1 with this fix