Add functions for working with triples
Add functions for working with triples

 - fst' retrieves the first element of a triple

 - tripleToCSV is a formatting function to get a csv with
   ngram,count,pmi

   The Maybe Double gets unwrapped before the T.Text string is
   fully formed.

 - Added module declaration to get at fromJust

 - Deleted extraneous blank lines

R-Morgan/NGramCrackers