Get Data From CSV

Gives me the option to get my data from a file. Useful for inputs that are long. Implementation is only for methods for now. 

```python
@parameterized.from_csv("data.csv")
def test_stuff(foo, bar):
     # assert something 
```

Comparing my function to yours, there's a lot more going on in the parameterized function but I am willing to implement them as well if you so require.