Documentation Improvement -- Typo in 10 Minutes to Pandas Tutorial? (date_range)
Hi all, I'm new to pandas and going through the tutorial: http://pandas.pydata.org/pandas-docs/stable/10min.html . At the top, under the Object Creation tutorial there's a date_range function, which is part of pandas so it has the pd in front of it:

In [5]: dates = pd.date_range('20130101',periods=6)

Later on, under Setting, there's another date_range function but this time without pd in front:

In [42]: s1 = pd.Series([1,2,3,4,5,6],index=date_range('20130102',periods=6))

I can't get it to run properly without adding a 'pd.' in front of the date_range, so I imagine this is a typo in the tutorial. The top cell of the image is the code as it's presented in the tutorial; the bottom cell is after adding .pd to it.

![image](https://f.cloud.github.com/assets/4527729/1104432/6421e5bc-18f8-11e3-9628-8f0ed5785a66.png)

It took me a minute or two to figure this out, so figured it might confuse people if in fact this is a typo, especially those new to pandas such as myself. I'm also seeing this same problem with some of the Series (specifically, histogram). And I'm running my IPython notebook from the top of the file, each time, so it's not like I haven't already evaluated the cells above:

Histogramming
In [65]: s = Series(np.random.randint(0,7,size=10))

String Methods
In [68]: s = Series(['A', 'B', 'C', 'Aaba', 'Baca', np.nan, 'CABA', 'dog', 'cat'])

Time Series
In [115]: ts = Series(randn(len(prng)), prng)

Other cells in Time Series above and below both use pd.Series. The error in all cases is: NameError: name 'Series' is not defined.

In Merge Concat section, concat instead of pd.concat. Here is what the tutorial gives:

In [73]: concat(pieces)
