Add suppress option to pd.set_option
I do computational physics and economics and often generate data that is very close to zero (on the order of 1e-14 to 1e-16).  When printing out a numpy array I often use the command 

``` python
import numpy as np

np.set_printoptions(suppress=True)
```

This will cause items close to zero to be displayed as zero. 

I think this would be a very simple addition to `pandas.set_option`. I'll try to work on it, but someone else who already knows the format of extending `pandas.set_option` will be able to get it done much more quickly.
