title: I Can insert nested values in Cassandra BUT can't import from CSV file
body: <p>I have this table in Cassandra :</p>
  
  <pre><code>CREATE TABLE footbaStatsleague (
       league int PRIMARY KEY,
       hometeam text,
       homegoal int,
       homegoalsplayer frozen&lt;map&lt;text,list&lt;int&gt;&gt;&gt;,
       awayteam text,
       awaygoals int,
       awaygoalsplayer frozen&lt;map&lt;text,list&lt;int&gt;&gt;&gt;,
       dategame timestamp,matchweek text
  ) WITH comment='Contains stats for europe football';
  </code></pre>
  
  <p>I can insert data without any problem :</p>
  
  <pre><code>INSERT INTO footbastatsleague (league, awaygoals, awaygoalsplayer,awayteam,dategame,homegoal,homegoalsplayer,hometeam,matchweek) VALUES 
  (222,3,{'André Schürrle':[52,65,68]},'Chelsea',1393686000000,1,{'John Heitinga':[74]},'Fulham','MW 28');
  </code></pre>
  
  <p>If I export data with COPY footbastatsleague to 'path/football.csv'; I get this:</p>
  
  <pre><code>222,3,"{'Andr Schrrle': [52, 65, 68]}",Chelsea,2014-03-01 15:00:00.000+0000,1,{'John Heitinga': [74]},Fulham,MW 28
  </code></pre>
  
  <p><strong>But</strong> if I try to import FROM CSV file with the same format exported before, I get this error in cql shell:</p>
  
  <blockquote>
    <p>Failed to import 1 rows: ParseError - Failed to parse {'Andr Schrrle':
    [52, 65, 68]} : unhashable type: 'list',  given up without retries
    Failed to process 1 rows; failed rows written to
    import_footballstatistics_footbastatsleague.err</p>
  </blockquote>
  
  <p>And I need import from CSV more than insert row by row. </p>