title: How to remove accents from values in columns?
body: <p>How do I change the special characters to the usual alphabet letters?
  This is my dataframe:</p>
  
  <pre><code>In [56]: cities
  Out[56]:
  
  Table Code  Country         Year        City        Value       
  240         Åland Islands   2014.0      MARIEHAMN   11437.0 1
  240         Åland Islands   2010.0      MARIEHAMN   5829.5  1
  240         Albania         2011.0      Durrës      113249.0
  240         Albania         2011.0      TIRANA      418495.0
  240         Albania         2011.0      Durrës      56511.0 
  </code></pre>
  
  <p>I want it to look like this:</p>
  
  <pre><code>In [56]: cities
  Out[56]:
  
  Table Code  Country         Year        City        Value       
  240         Aland Islands   2014.0      MARIEHAMN   11437.0 1
  240         Aland Islands   2010.0      MARIEHAMN   5829.5  1
  240         Albania         2011.0      Durres      113249.0
  240         Albania         2011.0      TIRANA      418495.0
  240         Albania         2011.0      Durres      56511.0 
  </code></pre>