Added independent chart examples.

This PR fixes #1014.
This seems to work too ;-)
```
df = pd.io.json.json_normalize(data["data"])

df[:10]
abbr	medals.bronze	medals.gold	medals.silver	medals.total	name
0	 ALB	 0	 0	 0	 0	 Albania
1	 AND	 0	 0	 0	 0	 Andorra
2	 ARG	 0	 0	 0	 0	 Argentina
3	 ARM	 0	 0	 0	 0	 Armenia
4	 AUS	 1	 0	 2	 3	 Australia
5	 AUT	 1	 2	 6	 9	 Austria
6	 AZE	 0	 0	 0	 0	 Azerbaijan
7	 BLR	 1	 5	 0	 6	 Belarus
8	 BEL	 0	 0	 0	 0	 Belgium
9	 BMU	 0	 0	 0	 0	 Bermuda
10 rows × 6 columns
```