Paradigm chopper

Paradigm chopper is a python script which removes redundant paradigm definitions from dictionaries, and fixes references to them. For example, if you have a dictionary thus:

  <pardef n="car__n">
    <e>
      <p>
        <l/>
        <r><s n="n"/><s n="sg"/></r>
      </p>
    </e>
    <e>
      <p>
        <l>s</l>
        <r><s n="n"/><s n="pl"/></r>
      </p>
    </e>
  </pardef>
  <pardef n="tree__n">
    <e>
      <p>
        <l/>
        <r><s n="n"/><s n="sg"/></r>
      </p>
    </e>
    <e>
      <p>
        <l>s</l>
        <r><s n="n"/><s n="pl"/></r>
      </p>
    </e> 
  </pardef>

it would remove the tree__n paradigm, and make all main section elements that point to this point to car__n instead. Currently if two paradigms are the same, it keeps the one with the shortest name.