title: gsl error while Installing mlpy
body: <p>I'm trying to install <code>mlpy</code> and I get the following error.  I don't know where to start.  Does someone have any clue?</p>
  
  <pre><code>$ sudo easy_install mlpy-3.5.0.tar.gz
  Password:
  install_dir /Library/Frameworks/Python.framework/Versions/6.2/lib/python2.6/site-packages/
  Processing mlpy-3.5.0.tar.gz
  Running mlpy-3.5.0/setup.py -q bdist_egg --dist-dir /tmp/easy_install-lQNT_3/mlpy-3.5.0/egg-dist-tmp-EPgtAi
  mlpy/gsl/gsl.c:223:24: error: gsl/gsl_sf.h: No such file or directory
  mlpy/gsl/gsl.c:224:39: error: gsl/gsl_statistics_double.h: No such file or directory
  error: Setup script exited with error: command 'gcc' failed with exit status 1
  </code></pre>