title: pandas DataFrame.to_string() truncating strings from columns
body: <p>When I try to use to_string to output a column from a <code>dataframe</code>, it truncates the output of the column.</p>
  
  <pre><code>print gtf_df.ix[:1][['transcript_id','attributes']].to_string(header=False,index=False)
  
  Out: ' CUFF.1.1  gene_id "CUFF.1"; transcript_id "CUFF.1.1"; FPKM '
  
  print gtf_df.ix[:1]['attributes'][0]
  
  Out: 'gene_id "CUFF.1"; transcript_id "CUFF.1.1"; FPKM "1670303.8168650887"; frac "1.000000"; conf_lo "0.000000"; conf_hi "5010911.450595"; cov "9658.694354";'
  </code></pre>
  
  <p>Any ideas as to how to resolve this problem?
  Thanks!   </p>