title: how to use/install gps python library
body: <pre><code>root@raspberrypi:~# python
  Python 2.7.3 (default, Jan 13 2013, 11:20:46)
  [GCC 4.6.3] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; from gps import gps
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  ImportError: cannot import name gps
  &gt;&gt;&gt; exit ()
  </code></pre>
  
  <p>it doesn't seem to work.
  Installed debian packages:
  gpsd, gpsd-clients, python-gps, libgps20, libgps-dev</p>