title: Pandas Yahoo Datareader RemoteDataError when end date added
body: <p>How come this code works on the yahoo data reader:</p>
  
  <pre><code>import pandas.io.data
  import pandas as pd
  import matplotlib.pyplot as plt
  import matplotlib as mpl
  import datetime
  
  
  df = pd.io.data.get_data_yahoo(['AAPL', 'GE', 'GOOG', 'IBM', 'KO', 'MSFT', 'PEP'],
                                 start='1/1/2010',)['Adj Close']
  </code></pre>
  
  <p>But if I add an end date it gives me an error</p>
  
  <pre><code>df = pd.io.data.get_data_yahoo(['AAPL', 'GE', 'GOOG', 'IBM', 'KO', 'MSFT', 'PEP'],
                                 start='1/1/2010',
                                 end='1/1/2013')['Adj Close']
  </code></pre>
  
  <p>Error</p>
  
  <pre><code>Message File Name   Line    Position    
  Traceback               
      &lt;module&gt;    &lt;module1&gt;   21      
      get_data_yahoo  C:\Python33\lib\site-packages\pandas\io\data.py 402     
      _get_data_from  C:\Python33\lib\site-packages\pandas\io\data.py 355     
      _dl_mult_symbols    C:\Python33\lib\site-packages\pandas\io\data.py 335     
  RemoteDataError: No data fetched using '_get_hist_yahoo'    
  </code></pre>
  
  <p>Pandas version '0.14.1-171-g08cf60a'</p>
  
  <p>Python 3.3.3</p>