Fixed spelling error.

README

@@ -16,7 +16,7 @@ know about.)  This module has a few features that sets it apart:
      - a serial port (using the pySerial module)
      - a program run via os.popen()
      - a generic TCP session
-     - a program started via Peter Årstrands popen5 module (FIXME: not
+     - a program started via Peter Åstrands popen5 module (FIXME: not
        yet implemented)
      - a program started in a pty, but with the stderr of the program
        collected via a pipe so that you can differentiate between