title: Creating images of notes in music21
body: <p>I get an error when running:</p>
  
  <pre><code>from music21 import *
  
  n1 = note.Note('C4', quarterLength=1)
  n2 = note.Note('A4', quarterLength=1)
  s = stream.Stream()
  s.append(n1)
  s.append(n2)
  s.show('lily.svg')
  
  Traceback (most recent call last):
    File "C:\Python34\test.py", line 7, in &lt;module&gt;
      s.show('lily.svg')
    File "C:\Python34\lib\site-packages\music21\base.py", line 2206, in show
      return formatWriter.show(self, regularizedConverterFormat, app=app, subformats=subformats, **keywords)
    File "C:\Python34\lib\site-packages\music21\converter\subConverters.py", line 277, in show
      returnedFilePath = self.write(obj, fmt, subformats=subformats, **keywords)
    File "C:\Python34\lib\site-packages\music21\converter\subConverters.py", line 245, in write
      conv = lily.translate.LilypondConverter()
    File "C:\Python34\lib\site-packages\music21\lily\translate.py", line 147, in __init__
      self.setupTools()
    File "C:\Python34\lib\site-packages\music21\lily\translate.py", line 177, in setupTools
      versionString = versionString.split()[-1]
  IndexError: list index out of range
  </code></pre>
  
  <p>I have installed scipy and mathplotlib so music21 doesn't complain anymore about them not being available.
  I run Python 3.4 on Windows 7.</p>
  
  <p>If I instead use <code>s.show('musicxml.png')</code> to get my images I get the error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "C:\Python34\test.py", line 7, in &lt;module&gt;
      s.show('musicxml.png')
    File "C:\Python34\lib\site-packages\music21\base.py", line 2206, in show
      return formatWriter.show(self, regularizedConverterFormat, app=app, subformats=subformats, **keywords)
    File "C:\Python34\lib\site-packages\music21\converter\subConverters.py", line 147, in show
      returnedFilePath = self.write(obj, fmt, subformats=subformats, **keywords)
    File "C:\Python34\lib\site-packages\music21\converter\subConverters.py", line 637, in write
      fp = self.runThroughMusescore(fp, **keywords)
    File "C:\Python34\lib\site-packages\music21\converter\subConverters.py", line 606, in runThroughMusescore
      elif not os.path.exists(musescoreFile):
    File "C:\Python34\lib\genericpath.py", line 19, in exists
      os.stat(path)
  TypeError: stat: can't specify None for path argument
  </code></pre>
  
  <p>What do I have to do to get images (preferably svg)?</p>