Add link to more info on cmd vs interpreter vs editor

I'm hoping to use this tutorial for a beginners' session but have found that beginners often struggle with the difference between command-line, interpreter, and files.  Link to the djangogirls tutorial, which is the best resource i know on the subject.

Author: hjwp

source/getting_started.rst

@@ -269,3 +269,14 @@ And now we are all set and can get started with turtle!
    --- rather use more appropriate names such as :file:`square.py` or 
    :file:`rectangle.py`.  Otherwise, whenever you refer to ``turtle``, Python 
    will pick up *your* file instead of the standard Python turtle module.
+
+
+Too fast?  More information here
+--------------------------------
+
+Was that whirlwind intro to the command line, the python interpreter, and 
+saving files, a little quick?  Are you left feeling a little unsure about what's 
+what?  Check out the first few introductory sections of the djangogirls
+tutorial for an overview at a more gentle pace:
+
+http://tutorial.djangogirls.org/en/intro_to_command_line/