Examples.

This is a small collection of examples.  All contributions are welcome.
To run the scripts do (for example):

    python animation.py

Here is a list of the scripts:

faithful.py          make very nice graphs from the 'Old faithful'
		     data. (Contributed by Tim Churches.)
chisquared.py	     plotting of the chi-squared density.
animation.py	     plotting of the chi-squared density with different
		     degrees of freedom.

These are small examples of the use of conversion modes.  See the manual for
details.

useful/erobj.py      Enhanced version of the Robj type, using the
		     PROC_CONVERSION mode.
useful/dataframe.py  DataFrame Python class to mimic the data frame R class.
