title: Unknown file type error with .pxd file
body: <p>I try to install <a href="http://dzhelil.info/triangle/installing.html" rel="nofollow noreferrer">triangle</a> for python on Kubuntu 14.04. Either if I try to install it via easy_install or from source, I receive the following error:</p>
  
  <pre><code>sudo easy_install triangle
  Processing triangle
  Writing /home/magnus/triangle/setup.cfg
  Running setup.py -q bdist_egg --dist-dir /home/magnus/triangle/egg-dist-tmp-sJ6dHl
  Searching for setuptools&gt;=18.0
  Best match: setuptools 19.2
  Processing setuptools-19.2-py2.7.egg
  
  Using /home/magnus/triangle/setuptools-19.2-py2.7.egg
  /home/magnus/triangle/core.pyx:5:35: Expected an identifier or literal
  error: Setup script exited with error: unknown file type '.pxd' (from 'triangle/c_triangle.pxd')
  </code></pre>
  
  <p>It seems to be a similar problem as mentioned in <a href="https://stackoverflow.com/questions/6846084/unknown-file-type-error-with-pyx-file">this question</a>, but I can't figure out how to fix it. My Cython version is:</p>
  
  <pre><code>cython --version
  Cython version 0.20.1post0
  </code></pre>
  
  <p>Does someone know how to fix this? Any help is highly appreciated.</p>