title: PANDAS coarse dates (month/year)
body: <p>Say I'm looking at the Rdataset acme.csv found <a href="http://vincentarelbundock.github.io/Rdatasets/csv/boot/acme.csv" rel="nofollow">here</a>. How do I import this with appropriately coarse date? Using parse_dates, it assigns the day to the present day (today being the 18th of July), since no day was specified. Can I make it deal with just month/year like the table is but keep using the date functionality of PANDAS?</p>
  
  <pre><code>import pandas as pd
  url = 'http://vincentarelbundock.github.io/Rdatasets/csv/boot/acme.csv'
  df = pd.read_csv(url, parse_dates=[1])
  df.drop('Unnamed: 0', axis=1, inplace=True)
  </code></pre>